Re: [AMC-list] AMC twin grip posi question interchange

["Armand Eshleman" <aje1@xxxxxxxxxxxxxxx>]

Darren,

You're line of thinking makes a lot of sense regarding the same carrier for 
twin grip or open diff. However the engineers at AMC didn't see it your way.
Unfortunately there is a carrier for twin grip and a carrier for the 
conventioal open style differential.
I am still working on installing a twin grip differential carrier into the 
white Javelin's AMC 20 rear axle.
I removed a 3.15 open carrier and I'm installing a 2.72 twip grip or as the 
Jeep guys call it, trak lok, I believe.
There is without a doubt two separate carriers for each style differential.
Also there is a carrier for twin grip ratios that are different from other 
twin grip ratios. If you desire the 2.87 gears to remain in your rear axle, 
you will need to find a twin grip carrier that will accomodate the 2.87 
gears.
Now this one I'm not sure of exactly. There is a cut off point as to which 
gears fit which carrier. I believe 2.72 and 2.56 take the same carrier, as 
does I believe 2.87 and 3.15 ratios, not exactly sure on that, and the 
3.73's and up take another carrier. Please some one correct me if I'm 
wrong...

Good luck with it Darrern,

Armand



> Darren below wants to make a twin grip and has some tech questions, anyone 
> wishing to reply please feel free to do so, copy your reply to him and 
> thanks in advance to all who might reply.
> Eddie Stakes
> 713.464.8825
> eddiestakes@xxxxxxxxxxxxxxxxxxxx
> www.planethoustonamx.com
>
> ----- Original Message ----- 
> From: Darren Massaro     dsm6678@xxxxxxxxxxx
>
>
>
> Hello Eddie!
>
> I want to make my 287:1 conventional rear to a twin grip limited slip rear 
> I have been studying the service manual and the only difference I can see 
> between the conventional rear and twin grip rear is that the twin grip 
> rear has clutch disks,plates, and a belleville washer.
>
> I see that the differential gear needs splines in it for the clutch parts 
> to slide onto. Does the conventional differential gear have those splines 
> in it? What I mean is that is the differential gear  made the same for 
> both twin grip and conventional? I would think it would be cheaper to make 
> them both the same and amc just added a clutch if someone optioned the 
> twin grip rear.
>
> Thanks for your time
>
>
> Darren M

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