TH400 to manual transmission replacement

[Dirt]

Need to remove a th400 from a car and replace it with a manual transmission, anyone know of a suitable replacement, it's for a 6000lb vehicle.

[doug odom]

6000 pound car?  What is it going to be used for?      Doug Odom in big ditch

[Dirt]

It's a 76 Rolls Royce Silver Shadow, it's a heavy car.

[Rex Schimmer]

Try to find some of the NASCAR teams they sell their used stuff for a very reasonable price and most of it only will have one race on it. Their trannys can be had at a pretty good discount over a new one and they are state of the art and will take 850 hps on a 3400 lb car.

Rex

[desotoman]

It's a 76 Rolls Royce Silver Shadow, it's a heavy car.

Just curious, why would someone want a manual transmission in a Rolls Royce Silver Shadow? The turbo 400 can be built to take any abuse a 6000 lb. car can give it. They were standard equipment for crewcabs with 454 chevys that towed some very heavy trailers in stock form.

Tom G.

[russ jensen]

 GM has a real tough 4sp tranny- suburbans w/ towing pkg & pu's- has a low gear for pulling stumps.

[Sumner]

GM has a real tough 4sp tranny- suburbans w/ towing pkg & pu's- has a low gear for pulling stumps.

Russ are you talking about the 4L80 E that is based on the 400??  Here are it's ratios:

4L80E..................2.48.....1.48....1.0.... .75

The 700R4/4L60/4L60E/4L65E is the one with the low first and higher overdrive:

700-R4/4L60.......3.06.....1.63....1.0.... .70

It isn't as strong, but my truck is over 5800 lbs. with the truck and teardrop and I have used a "built" 700R4 behind it with no problems and it has 140,000 miles on it now with 45,000 miles towing.

I agree with Tom though that the 400 could be built plenty strong, but maybe the person just has to have a manual.  If so I would look at one of the 6 speeds from a viper or vette for a road transmission (Borg-Warner T-56 transmission or the Tremec TR-6060 transmission which has succeeded the T-56 for some applications).

c ya,

Sum 

[DCarr511]

Need to remove a th400 from a car and replace it with a manual transmission, anyone know of a suitable replacement, it's for a 6000lb vehicle.

What gear ratio's are you looking for ?

[russ jensen]

GM has a real tough 4sp tranny- suburbans w/ towing pkg & pu's- has a low gear for pulling stumps.

Russ are you talking about the 4L80 E that is based on the 400??  Here are it's ratios:



c ya,

Sum 

NO- talking 4 sp manual heavy cast iron-very tough tranny as trk pullers shell out several rockwell rears & tranny keeps on ticking. Don't know for sure but think they are new process. bought a 80 surburban just to get tranny.bty the turbo 400 are plenty tough- have one behind 392 in tractor w/ 0 problems.