Re: eldo tranny/differential
- Hey Cody, check this link out... found it on google. All about the
FWD Motorhomes, looks like the 8 lug is just an adapter, otherwise
the front end, control arms and all, look IDENTICAL do the FWD
FireKhan aka Solaris
--- In Cadillac_Performance_Association@y..., "Cody G. Carson"
> Thank you for that information. I posted a message a few weeks agotranny
> that gave links to several tranny shops-but have not had time to
> check all of them out. I have heard that the motor home's FWD
> is in fact interchangeable, and I believe that the 8 lug patternis a
> function of the wheel hub only (making the axle shafts a possiblethe
> swap as well, if the out put shaft splines and shaft lenght are
> same.) It is a very interesting thing to consider, and I amcurious
> to see if in fact tose transmissions have a lower first and secondyet
> gear, which would make running the 2.73 diff more practical for a
> drag/street application. I have also heard on the MTS board that
> other gear ratios are available for the motor homes, but do not
> know the names of any suppliers. I think the people who do knowthat
> answer check the board often, and might be able to help withanswers.
> Personally, I like the 2.73 in my 70 Eldo since it puts the topend
> at about 155 mph. (have not tried to get there yet however) butwould
> like a lower 1st gear to get the car out of the hole with outthe
> roasting the tires so bad. That high first gear will really let
> tires spin wildly when you break traction, and you really have tofirst
> come off off of the throttle to get it to hook again. A lower
> gear would allow more control and more power at launch. the 2.73
> final would keep top speed good, and gas mileage at an acceptable
> level for a street car.
Since the internal parts in the TH425 are same as a TH400,
I bet you could swap in the planetary gears needed for a
lower 1st gear. Fyi - some 1 ton trucks/buses and rwd
motorhomes had lower 1st [maybe 2nd too?]. The aftermarket
has the planatary sets too. Pricey though.
> I've seen alot of requests for different gear ratios for the eldoson
> this and other message boards. This might be worth looking into; Into
> the 70's GMC made a motorhome based on the toronado 455/425thm
> drivetrain. The motorhomes are easy to spot, they have two single
> wheel rear axles. There is one by my work and I peeked underneath
> see if it was really front wheel drive. It was, and it had reallythe
> beefy front axles that took eight lug wheels. I don't know if this
> tranny/differential/axles are a direct bolt-on to an eldorado but
> knowing GM they probably will be sharing many internal parts with
> eldo. This tranny probably has a granny first and the differential
> ratio surely would be lower than 2.73 on a 10,000 + lb motorhome.
> This might be worth looking into if you are looking to beef up your
> drivetrain or lower your gear ratio.