auxilary overdrive ?

[Dieselguy123]

Hey all, does anyone know how much a gearvendors unit shortens your driveshaft? I would like to put one on my truck but I am begining to have my doubts, my wheelbase is only 117" and even though its 2wd it still makes for a pretty short driveshaft, I really dont think that I could fit one of these in there, any thoughts -Brad-

 

[Mr_Roboto]

Short driveshafts can be dealt with with CV joints or double cardan joints.

 

[IDIeselman]

I have to agree with Mr_ Roboto, A double cardan shaft from a bronco would be easily adapted.

 

[Darrin Tosh]

It shouldn't be a probelm, These GV Units are used in hot rods and all kinds of cars and trucks, A lot of them have short driveshafts also.

 

[wwwabbit]

Have you ever seen how short a factory rear drive shaft is on a Jeep CJ5? You got lots of room to play with.

 

[apextrans]

I installed a GV on my IDI & IIRC I had to shorten the driveshaft 14", which left me with a front driveshaft length (had a crew cab with a 2 piece rear driveshaft) of 11.25" in front of the carrier bearing. Driveshaft angle is very important when you install a GV & I had no problems. Well worth the money!!

 

[apextrans]

Here's a few pic of it on the truck.

 

[Dieselguy123]

Have you ever seen how short a factory rear drive shaft is on a Jeep CJ5? You got lots of room to play with.

Thats funny you say that, I,ve got one in my garage right now that I am rebuilding the motor in for someone. I didnt happen to notice the driveshaft though, I will have to look. -Brad-

 

[jauguston]

Brad,

There are two different models of the GV overdrive. The one I have is like the one pictured in another post. They also have one that doesn't increase the transmission length. That model requires the replacement of the transmission output shaft with one from them. Otherwise the same OD unit, just a more complicated installation and more money.

Jim