Overdrive unit

vipergts · Post by **vipergts** » Sun Jan 12, 14 10:43 am

Anyone here got one fitted? Anygood?

How does it work and what does it give you?

How many monies?

In laymans terms.

Dave-R · Post by **Dave-R** » Sun Jan 12, 14 10:55 am

Do you mean a gear vendors unit?

Think I was their second or third UK customer.

One of the best mods I ever made to my car. Loved it. I was able to run 4.30:1 ratio gears as the effective ratio was more like 3.30:1.

http://challenger.mpoli.fi/board/viewto ... 9182#p9182

However I would recommend that you check the end play clearances on your transmission output shaft after fitting the tail shaft adaptor.

http://challenger.mpoli.fi/board/viewto ... 889#p11889

Pete · Post by **Pete** » Sun Jan 12, 14 10:55 am

Do you mean the Gear Vendors for the A727??

If you check out Dave Robson's Challenger thread there is a lot of detail there....Expensive which ever way you cut it

An alternative is to go the route Jon Conolley is taking on one of the newer transmissions.....there is a thread running on this as well.....

Pete · Post by **Pete** » Sun Jan 12, 14 10:56 am

Quick again, Dave

vipergts · Post by **vipergts** » Sun Jan 12, 14 12:13 pm

Yeah that must be the unit....Anton mentioned it.

I think it's the preferred route for me because the car is fully matching numbers and I'd like to keep the 727.

I'll read up on the links but sounds like a great addition, saves revving the nuts off it when cruising

vipergts · Post by **vipergts** » Sun Jan 12, 14 12:22 pm

Do we know anyone that's fitted to a Charger?

Dave you seemed to have to do a lot of fettling, what was this system designed specifically for ?

Dave-R · Post by **Dave-R** » Sun Jan 12, 14 2:00 pm

That was the system for E-Body. I am told the B-Body is a little easier. But this is what American companies call "bolt-in". Get used to it.

The unit itself is a British OD Unit. The US company just basically go through them and make the tail shaft adaptors and electronics.

You don't really need all the electronics to be honest. I would rather just have 12volts manually switching the OD on and off as to be honest I liked it better in manual mode anyway.

vipergts · Post by **vipergts** » Sun Jan 12, 14 3:52 pm

And is the kit trumpy?

ANTON · Post by **ANTON** » Sun Jan 12, 14 4:53 pm

Adam and Alan had them fitted to there chargers.

Here is the kit.

http://smrtrans.tripod.com/smrtransmiss ... /id33.html

Dave-R · Post by **Dave-R** » Sun Jan 12, 14 5:58 pm

Anton that one is a lot shorter than the GV one I fitted. My 727 combo was 14" longer than stock.

The shorter prop shaft makes it stronger of course. But also made getting the pinion angles harder.
That shorter tailshaft would need less messing around to get the angles right.

vipergts · Post by **vipergts** » Sun Jan 12, 14 5:59 pm

Thanks Anton.....We need to book this for Spring time.

Hows the Mustang lump?