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The Turbo Hydramatic 350 (or Turbo 350 as it is more commonly known) is one of the most popular automatic transmissions of all time.
Fitted to millions of street rods, pony cars, and small block-powered street machines, turbo 350s are lightweight, easy to install, and lend themselves well to engine and transmission swaps. Though in stock form, they are best suited for use behind mild small blocks and smaller engines such as V6s, a TCI® prepped Super StreetFighter™ or Competition Turbo 350 can handle over 600 normally aspirated horsepower.
As an industry-leading manufacturer of high-performance automatic transmissions, TCI® has a wide variety of top-quality Turbo 350 transmissions and internal components. With a lineup of Turbo 350 products ranging from stock to full race, TCI® has the right components to address all of your transmission needs.
Far from just being an industry-leading manufacturer of “ready-to-run” automatic transmissions and torque converters, TCI® also carries all of those hard to find transmission swap components that you’ve been looking for –mid mount engine plates, adapter plates, kickdown linkage brackets, shifter and TV cables, speedometer gears, shifters, and much, much more. All TCI® transmissions, torque converters, and valve bodies are triple-tested in our state-of-the-art manufacturing and research facility in order to ensure reliable performance before they ever see the inside of one of our shipping cartons, and our internal components are guaranteed to be the very best that money can buy. So check out TCI® for all of your Turbo 350 needs –that high powered small block under the hood of your street machine will thank you!
Turbo 350 Transmissions
Triple
Tested Quality
We go the extra mile to ensure your
transmission is superior in both form and function.
Beginning with a
careful inspection of the transmission case and components that will be
used, we replace stock parts with high performance bands and components
where applicable. We increase fluid flow, lubrication system and thrust
capacity. Problematic hard parts are replaced with stronger components,
many of which we fabricate ourselves at our in-house machining centers.
Valve bodies are completely remanufactured and 100% tested prior to
installation. Finally, each and every TCI® transmission must pass both a
static hydraulic pressure test during assembly and a final dyno test prior to
shipping. That's Triple Tested so you can be confident you're getting a transmission that's
ready to rock.
For
details regarding the different types of TCI® transmissions, click
here.
Applications
Engine Size
Sizzler®
StreetFighter®
Super
StreetFighter™
Chevrolet,
TH350, non lock-up, with 6" tailshaft
Chevy
V8, 4.3L V6
311038
311000
311010 1
311005
Chevrolet,
TH350, non lock-up, with 9" tailshaft
Chevy
V8, 4.3L V6
311090
Chevrolet,
TH350, non lock-up, with 12" tailshaft
Chevy
V8, 4.3L V6
311012
Buick,
Oldsmobile, Pontiac TH350, non lock-up, with 6"
tailshaft
All
B.O.P V8
311100
311110 1
311100
Buick,
Oldsmobile, Pontiac TH350, non lock-up, with 9"
tailshaft
All
B.O.P V8
311190
1 With
special low gear planetary installed (TH350 - 2.75 low/TH400 -
2.75 low, 1.57
2nd)
2 Extra heavy-duty version with
Red Eagle clutches & Kolene treated steels
Torque Converters
Triple
Tested Quality
TCI®
strives to produce the best torque converters in the industry. Part of
the process involves ensuring that each unit is built to spec. Regardless
of what category or price level it may fall into, every TCI® torque
converter is Triple Tested during assembly.
Once all the prep work on
the component parts has been completed, the impeller is welded to the
front cover. Immediately following this process, a pair of dial
indicators are employed on a rotating table to verify that the impeller
body and pump drive hub remain true.
Each unit is then
pressurized and subjected to a leak test to confirm the integrity of all
the weld seams. Lastly, each unit is computer balanced to reduce
annoying and potentially damaging drivetrain vibrations that would occur
from an unbalanced torque converter. That's Triple Tested so you can be confident you're getting a
torque converter that's
ready to roll.
1965-81
TH350, 375
with small bolt pattern (except lock-up)
241538
241500
241502 3
241300
241100
242100
2421012
242102
2 242122
1965-91
TH350,400
with small bolt pattern
241101
2
1965-91
TH350,400
with wide bolt pattern
241200
1965-91
TH350,400
with dual bolt pattern (168-tooth flywheel)
240900
2409012
241000
2410012
2410022
241022
1 Special high stall unit, great for light vehicles
2 With heavy-duty front anti-ballooning plate for nitrous applications
3 For Buick, Pontiac, Oldsmobile with small bolt circle and mounting lugs
4 Low stall configuration
Turbo Hydramatic 350 Valve
Bodies
The transmission valve body is the brain of the transmission. Often it is called the control valve. Valve bodies, like automatic transmissions themselves, have been changed and updated through
the years. We select and use only the valve bodies that will provide you with the best performance
and service. All TCI® valve bodies are 100% quality checked for proper function and, where applicable,
proper operating pressures on a dedicated valve body test machine.
We offer three types of modified valve bodies for your Turbo 350:
StreetFighter® Series - Manual/Automatic Our manual/automatic valve body is designed for the street and strip performance car owner. It is the same valve body used in our StreetFighter® transmission series.
Full Manual Series
Our competition valve body for maximum performance and quick elapsed times in a racing application. By controlling the valve body only through manual means we can produce quicker shift timing and are
able to run higher line pressures than possible with an automatic shift transmission. Higher line pressure
makes it harder for clutches to slip under high loads. Remember, with a full manual you will have to make
every shift, for these units do not shift on their own. A great choice for bracket cars, monster trucks, and
virtually any off-road competition vehicle where a Trans-Brake is either not legal or not desired.
Trans-Brake Series
Our Trans-Brake Series allows you to achieve maximum torque converter stall and provides for quicker and more consistent reaction times and 60 foot times. This is due to the Trans-Brake action which prevents an
engine's torque load from being transmitted through the drive train prior to the launch. The Trans-Brake acts
in much the same manner as a manual clutch. Once the Trans-Brake is engaged, the vehicle can neither roll
forward nor backward and as you press on the accelerator the engine can rpm as high as the torque converter
stall. Once the Trans-Brake is released, the power is transmitted immediately to the rear tires in much the same
manner as a manual clutch but with the parts saving advantage of the torque converter's shock absorbing action.
Replacement Trans Brake Solenoid For Turbo 350
TCI®’s replacement trans brake solenoid features a precision-ground steel shaft with bronze bushing, a shaft-pinned nut for secure placement and unique lip seal to prevent fluid leakage while minimizing
mechanical drag. The conical-face design handles higher forces than standard flat-faced solenoids with
its 0.250” stroke. The high-efficiency, precision wound coil maximizes the force delivered by the solenoid,
and the two-wire set-up ensures a good quality ground. Fits TCI® Trans Brake Valve Body #321500.
Description
Part No.
Replacement solenoid for TH350 trans-brake valve body #221500
221301
Trans-Brake Release Valves
Precision-manufactured direct replacement for TCI® trans brake valve bodies.
Description
Part No.
Replacement
release valve & spring for #321500
321400
Transmission Service Kits and Shift Kits For Turbo Hydramatic 350
TCI® offers a full line of overhaul and rebuild kits, as well as valve body and shift kits for your Turbo 350. Whether your goal is to perform a simple shift reprogramming using one of our valve body kits, or a full
transmission overhaul with one of our Pro Super Kits, TCI® has got the parts to help you make it happen!
Application
Racing
Overhaul Kit
Master
Racing Overhaul Kit 2
Pro
Super Kit
Valve
Body Performance Improver Kit
Trans-Scat
Valve Body Kit
Racing
Filter and Pan Gasket
GM TH350, 1968 & later
(non lock-up)
328600
329000
329015 1
328800
326200
350000
328500
GM TH350, 1980 & later
(lock-up)
328700
329100
N/A
326300
N/A
328500
1 Special high horsepower
kit with HD Red clutches
2 Kit does not include band
Heavy-Duty Turbo 350 Flywheels and Flexplates
TCI® flywheels are .035" thicker than stock and the starter ring is welded to both sides of the flywheel for additional strength.
Constructed from a high tensile strength material these flywheels resist elongation and
cracking. All 168 tooth flywheels are sized for stock 3/8" mounting bolts and can be easily drilled for 7/16" diameter high performance torque converter applications. SFI 29.1 approved.
Engine Make
SFI 29.1 Approved
Trans Type
Engine Size
Balance
Remarks
Part No.
Chevy
Yes
GM
All
Internal
dual bolt pattern
168 tooth
399273
Chevy
Yes
GM
400
External
dual bolt pattern
168 tooth
399373
Chevy
Yes
GM
454
External
dual bolt pattern
168 tooth
399473
Chevy
Yes
GM
454
External
small bolt pattern
153 tooth
399554
Chevy
Yes
GM
LT1
External
small bolt pattern
153 tooth
399173
Chevy
Yes
GM
LT1
Internal
small bolt pattern
168 tooth
399174
Chevy
Yes
GM
All
Internal
small bolt pattern
153 tooth
399573
Chevy
Yes
GM
4.8, 5.3, 5.7, 6.0
LS-series
Internal
small bolt pattern
168 tooth
399753
Chevy
Yes
GM
'86-99
(1 pc. rear seal)
External
dual bolt pattern
168 tooth
399773 1
Chevy
Yes
GM
'91-98
(1 pc. rear seal)
External
dual bolt pattern
168 tooth
399873 2
Chevy
Yes
GM
'91-95
(1 pc. rear seal)
External
dual bolt pattern
168 tooth
399973 3
Pontiac
Yes
GM
326-455
Internal
small bolt pattern
166 tooth
2.750" crankshaft ID.
399673
1 Only for one piece rear seal engines
2 Only for Gen. V & Gen VI 454 HO & 502 HO with steel forged crankshafts
3 Only for Gen. V 454 with cast iron crankshafts
Chevrolet Flywheel Shims
These shims are an easy way to achieve optimum spacing when installing a new flywheel on Chevrolet
crankshafts. These 0.030" shims manufactured from high quality steel, are a must when additional clearance
is required between the starter and flywheel ring gear. Works on both automatic and standard shift flywheels
with standard Chevrolet crankshaft bolt flange and flywheel.
Description
Part No.
Chevrolet Flywheel Shims
399100
GM Turbo
Hydramatic 350 Internal Components
Aluminum Drums
Manufactured from 7075-T6 aluminum billet because of the outstanding strength properties of the material.
Reduces weight from the transmission's rotating mass without compromising drum integrity. All drums are
designed to hold up to five clutches and are hard-coat anodized for improved wear characteristics.
Not recommended for street use.
GM
TH350 Direct (Front) w/ 36 element heavy duty sprag installed
10.11
5.81
4.30
327800
TH 350 Direct Drum Assemblies
Got a high horsepower motor in front of your tranny? Replace your weak factory direct drum with our super-tough unit! A vastly improved 36-element Sprag assembly keeps your Turbo 350 alive during the critical 1-2 shift. Also available in aluminum for a big reduction in transmission rotating mass!
Description
Part No.
TH350 iron direct drum w/ heavy-duty 36-element Sprag Assembly
327900
As above
with an aluminum drum; save over four pounds
327800
Super
Outer Race, This special intermediate outer race helps prevent
roller clutch failures. Directly replaces stock outer race.
328900
Front
Pumps
Restore proper line pressure and performance during your next rebuild with a TCI® fully remanufactured front pump. Each TCI® pump assembly includes a reground pump cover, remachined pump pocket fitted with oversized gears coated with dry-film lubricant, new torque converter hub & stator tube bushings, and a new front seal new pump gasket.
Our TH350 Competition Pump has been machined to reduce pumping losses
and cavitation at high rpm and is ideal for class race vehicles.
Application
Part No.
NEW! GM TH350
(will not fit TH350C)
313400
TH350
Comp pump (not for street use)
327000
Low Gear Planetary
With additional gear reduction in first and second gear, our Turbo 350 low gear sets work great in all applications requiring additional gear for better take-off. From heavy drag cars to off-road 4x4s and tow trucks, a TCI® low gear planetary can improve low end torque and acceleration without adversely affecting the final drive ratio.
Application
Part No.
GM TH350 (2.75 1st, 1.52 2nd)
327500
Low Drag Components
Boost the efficiency of your Turbo 350 transmission by reducing power-robbing friction with this special low drag tailhousing. Stock casting w/ new billet tail-stock and roller bearing transfers maximum horsepower for quicker ETs.
Application
Part No.
GM TH350 Tailhousing with roller bearing
323100
Hardened Input Shafts
TCI® offers input shafts made from aircraft quality Vaccu Melt 300 steel billet for reliable service in high-horsepower street/strip and drag race applications. We also offer input shafts that will permit the use of a 17-spline Powerglide converter with your Turbo 350.
Application
Vaccu
Melt 300
TH350 input shaft with Powerglide
splines
327605 1
TH350 Aluminum
low gear drum with shaft installed, Vaccu Melt 300 material
323850
High Flow Filter System for TH350
In racing applications we have found that both the TH350 and Powerglide factory filters are questionable as to whether they can draw sufficient fluid under high rpm racing conditions. To assure a proper fluid supply at all times we have built an adapter kit to install a high flow Chrysler Torqueflite filter in both of these applications. Must be used in conjunction with a cast aluminum deep pan. Kit includes one filter, filter gasket, oil pan gasket,
and filter adapter with mounting hardware.
Application
Part No.
High Flow TH350 filter system
328505
Transmission Clutch Plates TCI® offers only the finest in friction materials for your Turbo Hydramatic! Our High Performance Frictions are ideal for most street and strip applications, and our Alto Red Eagle® clutch plates are available for those who demand ultimate performance.
High Performance Clutch Plates - Provide a high coefficient of friction and high temperature
resistance. Power apply applications have grooved surface area to improve clutch apply time.
Suitable for both racing and street strip applications. Special HD Alto Red Eagle® Clutch plates - Provide smoother shifts and longer life in very
high horsepower applications. Red Eagle® clutches are designed with a softer, more resilient
base paper which imparts less wear against the opposing steel plates. They are then saturated
in a phenolic resin and undergo a second saturation in a silicate, which imparts high heat
resistance to the friction paper. Special High-Static Reverse Clutch Plates - Stops forward creep due to clutch slippage while
Trans-Brake is applied. An excellent choice for Trans-Brake equipped cars. Available for TH350
and Powerglide transmissions. Kolene® treated Steel Plates - Greatly improves heat transfer across the surface of the steel
to prevent hot spots and warp due to high oil or surface temperature.
The Turbo Hydramatic 350 (or Turbo 350 as it is more commonly known) is one of the most popular automatic transmissions of all time.
TCI® offers only the finest in friction materials for your Turbo Hydramatic! Our High Performance Frictions are ideal for most street and strip applications, and our Alto Red Eagle® clutch plates are available for those who demand ultimate performance.