Mopar Muscle Association UK

Hi all,

Has any member used an overdrive system on their mopar,I am considering a gear vendors overdrive unit as the kits are readily available though a little pricey when you consider shipping and VAT etc.

Also see a couple of used set up's available in the US, nothing for a Mopar at the minute though but that could change at anytime.

It's basically a Laycock "P" type unit and have wondered if it would be possible to source parts here in the UK.

Any advice appreciated!

I fitted a Gear Vendors to the Road Runner, best thing I ever bought for it. Overdrive Repair Services in Sheffield have a deal with Gear Vendors to do warranty repairs on their behalf should anything go wrong with it.

I believe the Agent in the UK for new sales is Andy Frost.

Coals to Newcastle, ehh?

I had a roadrunner with gearvendor on, it worked well, this was already on the car,
If car is for road use and the odd drag racing day is rather just change the rear axle gearing as sacrifice the et, but can see the advantage of gearvendors for regular drag use and road use

Dave Rob ran one on his Chally

Thanks for the info guys,I called Frosty,he said to buy the gv from the states but without the electronic package as not needed with a manual transmission.
Then I called James at Overdrive repair in Sheffield who do a P type unit which mounts between the gearbox and rear axle.This is what it say's on their website,
Self contained Overdrive Unit that can be fitted to many applictions, which are popular with Bentley & Rolls Royce cars and come in either J or P type units.
£1000 J Type /£1200 P Type
The same overdrive unit as GV but mounted separately,and £1000 less than the purchase price of the GV unit.
But would this type require the use of a split propshaft to retain some kind of slide action previously taken by the splines at the rear of the original gearbox?

yeah that's the one they make for trucks

4x4 for off road 2 wheel drive with P type overdrive for motorway

Dave

Yes you would need a sliding yoke on one of the props. You would also need a crossmember to support it and fabricate a new tunnel section where it sits I would imagine. I really don't like the sound of this way around it, sounds to me like you could end up spending that extra grand trying to get it to work.

or put a 5 or 6 speed Tremec in

or a Passon performance 5 speed.

what size is your engine

how heavy is your car

would suggest a t5 out of a 2000-2004 mustang is good enough for most up to 318 size although some run em with 340s and 360s

but not for racing they can hold 320 Ftlb of torque in standard decent nick

more if you build them to close tolerances and use steel retainers.



Dave

Thanks guys for hearing me out,it always helps to bounce ideas around before making a mistake!
So I think the best thing would be to get the whole kit from gear vendors in a few months when my finances are in better shape.
The 440 in my charger has an A833 behind it and rear ratio of 3.23:1 and running stock 14" rims.

I think that's a sensible idea, at least you know it's going to work.

otherwise its a bolt up flange on both sides of the remote overdrive

you'd need the end of the propshaft that goes to the rear end modified in much the same way as you would if you were swapping out the mopar ball and trunnion set up for a slip yoke

you end up with a flange that has a hollow yoke on it
and a spline section welded to the end of the shaft to slide up and down in it

This kinda malarkey

where the OD would be to the left.



more detail on making a flanged thing a slideing yoke thing on this page


http://www.earlycuda.org/tech/ujoint.htm

Dave

smarty white wrote:Thanks guys for hearing me out,it always helps to bounce ideas around before making a mistake!
So I think the best thing would be to get the whole kit from gear vendors in a few months when my finances are in better shape.
The 440 in my charger has an A833 behind it and rear ratio of 3.23:1 and running stock 14" rims.

Yes I agree, I did buy a reconditioned Laycock unit on ebay some years back for £36, but, eventually re-sold it as I doubted GV would sell the other bits required to complete the job.
Chris