Look at the driver’s side of the transmission. The Turbo 350 has a “kickdown” cable attached to the right side attached to a manual linkage on the transmission. The Turbo 400 has an electrical switch.
How can I tell if I have a 400 Turbo transmission?
Look at the transmission pans on both transmission. Both transmission pans have 13 bolts, but they have a different shape. The TH-350 uses a square pan, with one corner cut off. The TH-400 uses an oblong-shaped pan with one side having a “hump” in the pan and one side is curved while the other two sides are straight.
What vehicles have a Turbo 400 transmission?
Generally, here’s a list of cars that used the TH400 transmission:
- 1965-1967, 327 V8 (Rambler/AMC)
- 1968-1971, 350 V8 (Buick)
- 1969-1972, 225 V6 (Buick)
- 1972-1975, 232 I6 (AMC)
- 1975-1979, 258 I6 (AMC)
- 1972-1979, 304 V8 (AMC)
- 1972-1979, 360 V8 (AMC)
- 1974-1975, 401 V8 (AMC)
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How do I identify my Chevy transmission?
Automatic transmission on a Chevy can be identified in one of two ways: You can look at the size of the pan on the transmission or you can search for the identification number that has been stamped somewhere on the casing. To undertake either method will require you to look under the vehicle.
Is a TH350 the same length as a TH400?
same length will depend on short tail or long tail in either version, plus the fact there are long and short type yokes as well. a vague answer… prolly not. the th400 uses a different yoke alltogether.
How much is a Turbo 400 transmission worth?
selling it as a good unit and with a “it will work” or your money back warrantee, it should be worth $150-200. There are many shops that sell a stock rebuilt TH400 for $600.
How do I know if my Turbo is 350 or 400?
Measure the transmission case with a tape measure. The Turbo 350 case measures 21 3/4-inches long from the front of the bellhousing to the rear of the case. Do not include the tailshaft housing which bolts to the rear of the case. The Turbo 400 measures 24 3/8-inches long from the belllhousing to the rear of the case.
How much horsepower can a Turbo 400 transmission handle?
About 400-450 HP/TQ is the limit on the stock TH400. With ONE almost free modification and some minor valve body calibration changes, 800 HP on an otherwise stock TH400 is not a problem if it’s assembled well (good endplay, etc), and the 34 element sprag is a wise addition above 450 HP or any drag usage.
Will a TH400 shift without vacuum?
Unless it has a manual valve body it won’t shift without vacuum until very high RPM’s. Besides the fact that when you disconect the vacumn line the line pressure goes to full which can wreak havock inside the transmission, I don’t think that it will shift into high gear.
Does a Turbo 400 transmission have overdrive?
The Turbo 400 has earned the reputation of a tough, reliable transmission that can survive harsh duty, but is there a better alternative? Although not often considered as such, much like the Turbo 400, the 4L85E is a solid contender for use in heavy, high-horsepower vehicles, and has the added benefit of an overdrive.
Where is the transmission model number located?
Open the driver’s side door and find the white card on the side of the door that is filled with small black lettering. This card contains specific details about the year the car was made, its transmission, engine specifications and other details. Underneath or beside the “TR” symbol will be a number code.
How do I identify my old GM transmission?
While there are no distinctive pans and bolt counts to make transmission identification simple, 4-speed manual transmissions can be generally identified by examining the side profile. The shape of the main housing will give a reasonably reliable indication of the transmission group to which your gearbox belongs.
Do transmissions have serial numbers?
There will be a small metal tag on one of the bolts holding the tranny case together, OR, more commonly, there will be numbers and letters cast into thetrans case itself, like TH400, or 4L60E for example. 2 people found this helpful. and some just have metric on the pan.
What’s better TH350 or TH400?
They are certainly are both great transmissions. … Whereas the TH350 would be found behind a lower performance small-block 350 Chevelle, the TH400 would be the transmission that came with the 454 SS. The TH400 also found itself in many heavy duty trucks and vans.
How much HP can a TH350 handle?
The TH350 from the mfg. indicated it was designed to handle 350tq and Gm soon realized it would handle much more than originaly designed for. same with the th400 it was meant to handle 400.
How long is a Turbo 400 transmission?
Chapter 2: Transmissions: Transmission Lengths
|Transmission||Case to ext. Housing||Overall Length|
|THM 400 (short tail)||24 3/8″||28 1/4″|
|THM 400 (long tail)||24 3/8″||34″|
|THM 200-4R||N/A||27 3/4″|
|THM 700R4, 4L60, 4L60E||23 3/8″||30 3/4″|