oldsvair

Is they any way to get posi traction from a stock 455 transaxel with a TH425?

Oldsguy

Monzas would be the first person I would ask.

Eric Rhodes

Did you ever get an answer?
I am wanting to put the drivetrain in the back of my Hearse. Can positraction be accomplished on the TH425

joe_padavano

How much do you want to spend? The GMC Motorhome community has these available. They are not cheap.

https://www.gmcrvparts.com/product-p/gm17-17.001.27.htm

Killian_Mörder

There's no such thing as expensive and cheap. Only rich and poor
There may be a good reason as to why manufacturers were reluctant in offering limited-slip differentials in front-drive vehicles. In a worst case scenario where an inexperienced driver was to apply too much acceleration around a wet or icey curved road, both front wheels could break loose from roadway traction, causing the vehicle to lose control which would be worse than when the rear axle would lose grip, because the front wheels could still compensate for rear axle traction loss through steering compensation. This was the main reason as to why electric-powered bicycles with front-mounted motors aren't generally prefered over ones with rear wheel-propelled versions.
A motorhome has somewhat different dynamics over a passenger car, in that the front axle is also supporting driver and co-pilot weight, as well as more of the body shell structure. A motorhome is also mostly driven under pleasant weather conditions and at slower speeds than a gentleman's front-drive luxury muscle car.
If the idea is to dragrace a Toronado, there's no better solution than to install Joe's pictured unit

EightballZ

throughout the years that topic came up several times BUT somehow i've never met anyone who pulled the trigger and installed this unit in a toronado. once i'm back home (2022) i'm gonna order one - unfortunately theres no used parts in the market so gonna pay full - and shipping to germany....aaand core deposit -.-

though i've heard other companies can build one as well - but they don't offer other gear ratios

Killian_Mörder

Perhaps, this subject should get a "sticky", since it frequently arises. All of these threads discussing this device should get consolodated, IMHO As long as the inspection authorities (T.Ü.V., DEKRA) don't notice this modification, you should have no trouble getting your certification

Golden Pig

So I just picked up a cherry 68 Toronado and will pull the trigger on this. Will document for everyone. Going with the 4:10 option. How much can it hurt 7 MPG? lol.

Killian_Mörder

It depends. Only hard working engines guzzle fuel. A 4:10 around town should get more MPGs than lower numbers:10

EightballZ

oh now thats some great news!!

Golden Pig