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post #1 of 40 (permalink) Old 05-20-2010, 07:51 AM Thread Starter
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What Needs To Be Modified

on an 8.8 track lock from a solid axle to fit the irs diff in our birds . no luck locating any info on this subject . scored a solid axle 8.8 with a trac lock really cheap out of a wrecked 97 gt , and i'd like to use it ..

i used to think i knew a lot , now with the trials and tribulations with the old and the modern i have i realize .... I DON'T KNOW JACK SH-- !!!!!!!!!!!!!!!!!!!!!!!!!!
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post #2 of 40 (permalink) Old 05-20-2010, 10:10 AM
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The gears might work but the trac-loc unit will not work.
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post #3 of 40 (permalink) Old 05-20-2010, 10:36 AM
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The gears will work.

The trac-lok will work. The side gears are the problem. Some remove the circlips on the half shafts and use a solid axle diff. There is a debate whether or not this is acceptable. Grooves can be machined into the solid axle trac-lok side gears to accept IRS half shaft circlips. IRS side gears can also be swapped into a solid axle trac-lok.

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post #4 of 40 (permalink) Old 05-20-2010, 11:03 AM
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Originally Posted by OhSnapWord View Post
The gears might work but the trac-loc unit will not work.
the track lock unit will work.....as mentioned above, you can either remove the clips, or get the side gears machined.

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post #5 of 40 (permalink) Old 05-20-2010, 11:47 AM
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You can use the trac-lok I just swapped in 3:73 8.8 W/track-lok from a mustang and did not machine anything and the clips are still on so I can pull the axles if I need to. Tight as can be.

No problems enjoy the new gears and posi too.
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post #6 of 40 (permalink) Old 05-20-2010, 11:57 AM
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You can assemble them that way, when you have to remove the axles to say change an axle seal you will find you cannot get it out. Really should have taken the advice on this one.
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post #7 of 40 (permalink) Old 05-20-2010, 01:32 PM Thread Starter
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thank you gentlemen . i'll go pull what i need out of it , stash it follow the advice given and go about my merry way . thanks again !!!!!!!!!!!

i used to think i knew a lot , now with the trials and tribulations with the old and the modern i have i realize .... I DON'T KNOW JACK SH-- !!!!!!!!!!!!!!!!!!!!!!!!!!
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post #8 of 40 (permalink) Old 05-20-2010, 01:39 PM
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Quote:
Originally Posted by 91bluecoupe View Post
You can use the trac-lok I just swapped in 3:73 8.8 W/track-lok from a mustang and did not machine anything and the clips are still on so I can pull the axles if I need to. Tight as can be.

No problems enjoy the new gears and posi too.
but, have you tried pulling the axles since you installed it?

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post #9 of 40 (permalink) Old 05-20-2010, 02:15 PM
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but, have you tried pulling the axles since you installed it?
this usually ends badly from what I've read about peoples experiences.

Spinning pies like wheels.

DD driving my 20 year old project

Now with new ball joints...again
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post #10 of 40 (permalink) Old 05-20-2010, 02:16 PM
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Yes I had to pull the one side axle back out because the boot had a hole I did not have a problem, that was after about 200 miles so far so good.

Plus I put new seals in at the time. I should not have to mess with it again for another 200,000 miles.
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post #11 of 40 (permalink) Old 05-20-2010, 02:22 PM
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Thats a chance you are willing to take I suppose.
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post #12 of 40 (permalink) Old 05-20-2010, 02:46 PM
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I am sure others have done this to, but I am just being honest and telling it like it is.

I will report back if any problems come up.
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post #13 of 40 (permalink) Old 05-20-2010, 02:52 PM
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I am sure others have done this to, but I am just being honest and telling it like it is.

I will report back if any problems come up.
thats cool.....I have just seen those clips not allow the axle to come back out..

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post #14 of 40 (permalink) Old 05-20-2010, 02:56 PM
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Yeah right now I am just enjoying the 3.73 and the posi. My car feels alot more planted with both wheels pulling with the lower gears.

Alot more fun to drive for sure.
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post #15 of 40 (permalink) Old 05-20-2010, 06:07 PM
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ask Kdanner's opinion on this one lol.

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post #16 of 40 (permalink) Old 05-20-2010, 08:18 PM
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I thought I read somewhere that after a certain year, the side gears already have the champher that they need to let the circlips do their thing. Allan, you are the expert on this. Any thruth to that? To me, it makes sense. Why pay for two different gears if one style will work in both applications. I would have done it if I was the diff manufacturer.
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post #17 of 40 (permalink) Old 05-20-2010, 08:21 PM Thread Starter
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dain paintme you in the military ???? military brat and spent a few years in lawton and fort sill i did ............. i would say i'll leave the clips out { wrote down what you all suggested in crayon on construction paper so i'd have no prob understanding it! } , and maybe someday i can get to it ........ i would do it to the spare irs outta the 91 but i sold it to a buddy for his 48 pick 'em up . i traded a bent 9 inch with 3.89's in it for the 8.8 . the 9inch was a freebie .....

i used to think i knew a lot , now with the trials and tribulations with the old and the modern i have i realize .... I DON'T KNOW JACK SH-- !!!!!!!!!!!!!!!!!!!!!!!!!!
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post #18 of 40 (permalink) Old 05-20-2010, 09:42 PM
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I thought I read somewhere that after a certain year, the side gears already have the champher that they need to let the circlips do their thing. Allan, you are the expert on this. Any thruth to that? To me, it makes sense. Why pay for two different gears if one style will work in both applications. I would have done it if I was the diff manufacturer.
Yeh, I've heard that too. I've read anything 1997- is always machined for IRS.
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post #19 of 40 (permalink) Old 05-20-2010, 10:08 PM
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Quote:
Originally Posted by RESET View Post
I thought I read somewhere that after a certain year, the side gears already have the champher that they need to let the circlips do their thing. Allan, you are the expert on this. Any thruth to that? To me, it makes sense. Why pay for two different gears if one style will work in both applications. I would have done it if I was the diff manufacturer.
I think that only applies to FRPP gears, I recently tore apart a 98 mustang rearend and they were not machined for IRS.
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post #20 of 40 (permalink) Old 05-21-2010, 12:20 AM
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Bummer
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post #21 of 40 (permalink) Old 05-21-2010, 08:14 AM
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I think that only applies to FRPP gears, I recently tore apart a 98 mustang rearend and they were not machined for IRS.
Alan
my diff came out of a 01 or 02 8.8, and the side gears were not machined either.

Nick......................I'm back!!!
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rest in peace JL
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post #22 of 40 (permalink) Old 05-21-2010, 08:54 AM
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I will keep you posted.
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post #23 of 40 (permalink) Old 05-21-2010, 05:36 PM
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I have never seen the inside of any Diff let alone the 8.8, TL or other wise so please forgive me if this is a stupid question. What is so different between the two carriers that make it so that a guy couldn't just swap the side gears from his open diff into a solid axel TL unit and be done with it? Allan, you got a blown apart pic of the two that would help me visualize this?
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post #24 of 40 (permalink) Old 05-21-2010, 05:50 PM
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The side gears are a different length on each(TL versus open). The TL gears have notches for the clutches. The open is smooth.

Alan -
I am looking to open the groove on the side gears for the axle clips - Any suggestions on a safe way of doing this? I have a couple of TL to practice with.

-Robert
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post #25 of 40 (permalink) Old 05-21-2010, 06:24 PM
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A chamfer works as good as a step. You can do it by hand with a 1/4 die grinder and a few stones. It will be slow and probably easier to have someone put them on a lathe and machine them down first. I still finish them with a stone however.
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post #26 of 40 (permalink) Old 05-21-2010, 06:36 PM
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Thankyou for the info - Finishing them with a stone to smooth the splines and to tapper it towards the outside for easier removal of the halfshaft?
- Robert
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post #27 of 40 (permalink) Old 05-21-2010, 07:06 PM
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Yes. A good axle on hand to check fit is nice as well. I always test the fit before installing them. You can release it with a pocket screwdriver when it is just the gear on the shaft.
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post #28 of 40 (permalink) Old 05-21-2010, 07:40 PM
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You can release it with a pocket screwdriver when it is just the gear on the shaft...
...as opposed to taking the rear cover off, and really trying to get something in there to compress the clips far enough to allow the shaft to pull out. I believe KDanner went into great detail about this particular fiasco....and what he'd like to have done to the person responsible for his time spent trying to undo the douchebaggery.

Seriously. The gears are easily removed and taken to any competent machine shop to be turned on a lathe and have that chamfer put on them. Or leave the clips off. The shafts aren't going to just randomly fly out or anything if the circlips aren't there.

After all this, there's no excuse for just slamming those shafts in on non-IRS gears with the circlips on the shafts. None. You wouldn't just go ahead and weld your lugnuts on would you?
I'll even say that ever since this info was first posted ever (and thus archived and easily Searched), any further acts of knowingly putting these circlip'd shafts in non-IRS gears is an act of vandalism. It's the same as if you were to walk down the street and throw a rock through a window of every car you passed. You may not have to worry about it, but someone else might.

Delete my account.

Last edited by 94 Thunderbird XX; 05-23-2010 at 09:00 PM.
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post #29 of 40 (permalink) Old 05-21-2010, 10:37 PM
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Cool - Thanks again Alan
- Robert
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post #30 of 40 (permalink) Old 05-21-2010, 10:47 PM
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[OFFTOPIC]Sorry I have been misspelling your name Alan. Force of habit, my middle name is Allan.[/OFFTOPIC]
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