E420 (124.034) optional transmission?

[DangerMouse]

Greetings,

With my car starting to show it's age (not like a fine wine), I am reviewing options for a rebuilt transmission and new rear differential. The stock 4-speed transmission in my 95 E420 is the 722.366; given the differential plans and subsequent driving habits, I want the replacement to be over-engineered to handle stress.

Has anyone transplanted a rebuilt 722.370 transmission from the 5-litre platforms into a 400E/E420? Would there be any measurable benefit (stronger widgets) to doing so? Copy of the ATSG manual is inaccessible at the moment.

Thanks in advance,
-DM

[mbdoc]

The 722.3 transmissions are all simular in design, starting in 1981 here in the USA.
The only trans designed for any more TORQUE than your transmission is from the V-12 powered cars & they won't bolt to the V-8.
How many miles are on the car? Transmissions & differentials should last the life of the car IF they are properly maintained.

[DangerMouse]

Originally Posted by M.B.DOC

The 722.3 transmissions are all simular in design, starting in 1981 here in the USA. The only trans designed for any more TORQUE than your transmission is from the V-12 powered cars & they won't bolt to the V-8. How many miles are on the car? Transmissions & differentials should last the life of the car IF they are properly maintained.

Thanks for the useful information, Doc. I gather that any of the 722.3xx transmissions can bolt up with the M119 bell housing after some research on 500Ecstasy. Electronics are probably a different story entirely.

The car is crossing 162k miles, but has been well-maintained for the past 30k miles that I've owned it. Transmission shifts hard when cold (could be sticking valve) and demonstrates a nasty flare when the modulator was set past the halfway mark. I suspect worn clutches instead of the usual vacuum problems. The engine is slow to reach max speed when the kickdown switch is engaged, and occasionally "bogs" a thousand RPM after it does.

The differential mounts and flex disc are in great condition, yet the rear end occasionally "slams" into gear. I have read this could indicate pinion lash requiring a differential rebuild. One of those cases where I either pay up front or have my wallet shredded to death by a thousand paper cuts ;-)

What do you think?
-DM

[renyf1]

i don't u can swap it from the 500E and such because the housing is also wider

i remember reading thats the reason the 500e has only 2 seats in the back