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Detroit True Track Install QUESTIONS/answers


Loki03

Member
Joined
Nov 8, 2012
Messages
6
City
Washington
Vehicle Year
2003
Transmission
Manual
I'll be installing a True Track helical gear limited slip tomorrow afternoon, I have a few questions if anyone is able to answer.

Are the axle C-clips re-useable (silly Q, usually they are, but it never hurts to ask.)

Will I need longer graded bolts to mount the ring gear to the diff? (If so can you give me the length, diameter and thread pitch please. I'm doing this without a way to go buy hardware as town is a 30 minute drive...with a torn apart truck.)

Any other tips?


Thanks for the help, I'll try to get some pics and do a write up in this thread later so the next folks who find this will know what to do (and hopefully I won't have much what not to do stuff to add to the list.)
:beer::beer::beer::beer::beer::beer:
 
C clips are not a toss away item, reuse them.

I have never come across an after market locker/carrier that needed anything but stock ring gear bolts. That being said, you should replace the bolts any time to remove them.

And that being said....I have reused ring gear bolts many times without any issues. Just clean the threads and use a bit of red thread locker and torque them to spec.
 
^^What he said^^
my TruTrac was straight forward install. FYI I loved it untill i got one tire off the ground...... It was replaced by a Detroit in less that a week. Great LS design, fail for me not truly understanding how it worked.
 
Thanks for the replies.

Yeah my only concern with the bolts is if they are TTY (torque to yield) AKA stretch bolts. I have no fears of reusing any graded hardware that isn't TTY, the truck is a time capsule for a 2003, it only has 22k on it, and most of those were towed miles.

I've replaced circlips on CV axle ends in VWs and the like over the years, mainly because they were so easily deformed while removing them.

Well, Wish me luck, this is the first time I've "carved" into a pumpkin, I've mainly had FWD cars since I started wrenching, and never had a need to mess with my RWDs because none of them had an open diff.

I think this is the right buy, I did my research and I am loving the machine work done on these limited slips, should be awesome, even if for some reason I only have one rear wheel on the ground (it's no 4x4!)

I'll try to remember to take pics as I go... I rarely do when I am working, I always forget.
 
I just realized I have another important question.

The book shows a two jaw puller to remove the bearings and a special die and dowel to press them back in...

This is my major Duh moment.

I planned to reuse the bearings, but I don't have a proper press at my disposal. How tight is the stock interference fit? Am I going to need a press?


I've done the old redneck bottle jack and heavy object (like the truck itself) trick before, but I don't want to screw this up.
 
It can be a bugger to get the bearings off without the right puller.

I install new bearings with a hammer and aluminum bearing drivers at work. Much faster than using a press.
 
Considering the amount of work involved in removing the bearings and the chance they will be damaged in the process, it's better to just get new ones.
 
Howto install

While the RTV dries up I'll give you a quick write up... Sorry no pics. Like I said I have trouble bothering with a camera while working on a rig.

How to install the detroit true track helical gear limited slip in a newer ranger:

Step one: Get your shit together.
3/4" socket, 1/2" socket, 5/16 socket and box wrench, flathead driver, block of wood, chimichanga, jack, two jack stands, tire iron, beer, torque wrench, big ****ing hammer, socket wrench, prybar, vise and vee block, bearing driver, punch, another beer, brain, and a burrito.

Step two: get your shit together again: gloves, safety glasses, other stuff I am probably forgetting after the fact. like a drain pan and parts..

Like rtv, brake cleaner, 1,000 rags, some cardboard and sawdust, a naughty movie, and some new bearings.

Step three: loosen rear lugs, put the rear axle on the jack stands.

good job, crack a beer and have a burrito. Eat half and drink half, then drain the old fluid by removing all the bolts in the cover but the top three. Loosen those and gently pry the sucker back... now would be a good time to go look for that drain pan while it pisses all over the floor.

Go have a smoke.. if you don't smoke, you should start, it's fun.

Now eat that damn burrito, it's not going to eat itself.

Step four: OPTIONAL: pull the 5/16 bolt out and slide the pin out of the way to make it easier to remove the axles.

skipping it? o.k... remove the drums, and push the axles in one at a time. The C clips aren't so bad, rather than pulling them with pliers i just pushed them off with my fingers. set those aside...

Now get another beer, you have to be thirsty.

Step 5: slide the axles out enough to clear the diff carrier. Then loosen the bearing caps with your 3/4" socket, and a goddamn hammer.

once loose, remove them all the way.

Get that wood block and prybar out and put the block on the bottom of the casing. Pry that old junk out of there using the block as leverage and protection like a blackjack dealers union or something.


Step 6: clamp this guy directly in the vice with something to prevent scratching... if you aren't trashing it. (wanna buy my old open diff? its not scratched...much and its only got 22k on it!) back out the ring gear bolts about 1/2 way... using the hammer and 3/4 again.

if you have an impact wrench you are already smarter than me and you don't need to read this... go back to harvard you snotty bastard.

Get a dead blow hammer, or your wood block and big ****in hammer and walk that ring off... beware of messing up your ABS speed sensor ring if equipped.

you can alternately smack the heads of the bolts in an alternating pattern with a real hammer if you like, I did a combination of this and using a deadblow.

Next you can remove the abs sensor ring, use a deadblow, verrry light taps and take your time walking it off, it's flimsy.


Step I lost count: get the new differential out of the box and stare at it a while... drool a bit and look sadly at your wallet.

Now install the abs sensor very gently once again walking it on with a real steel hammer, be gentle and just flush it to the outer edge of the new diff.

Then place the ring gear on, and figure out how the hell to get it on... I walked mine on with the bolts by an alternating pattern and used the deadblow hammer a bit when needed.

to torque it you'll need your big ass vice and the vee block mentioned above... try not to clamp it on the bearing mounting surface.

Tighten these guys to 77 lbs
(locktight is a good idea too.)


STRETCHHHH..


Now smash those bearings in.. I got a shitty set of bearing drivers from harbor freight, these bearings need to be SEATED, not sit flush with the lip. Find a proper tool to seat them... I had to walk mine the rest of the way on with a punch... no bueno senor. ...

Reminds me.. once those are on, help yourself to a chimi.
Are we only on beer 3? Open another, you really aren't very good at this.

Step the next one:
clean everything up. compressed air is best, try not to use that brake cleaner yet unless you actually did use wood... silly rabbit.
once assembled, place the drivers side spacer back in, then ram that bastard in... or rather, gently place it back in, making sure to install the outer bearing races before you do... The other spacer should not be on the pass side yet.

Finger tighten the bearing cap on the drivers side. (If I didnt mention not to mix these up before... well thats why you read an entire howto before you start.)

Pry gently and install the passenger side spacer. I used a flathead and some finesse... you can use a dinglewhopper tool they sell for $30.

Now install the passenger side cap finger tight.

Torque these bastards to 83 foot pounds. I went 55 then 70 then 85, try not to go nuts all at once.

Step ahhh ****it: Now reinstall the axles and place the clip in, push the axles outward, drop in the provided axle spacer, then fight that stupid retainer in there... I had to tap around it with a hammer and punch a bit, just wouldnt go in straight.
Install the circlip retainer ring, then rotate it to be sure its seated...

Step step trip: clean the mounting surfaces (well... shoulda cleaned it with the diff out, like I did.) and rtv them... install bolts finger tight, allow RTV to dry,... Then go do what I am about to do...

Turn them 1/2 turn more, or until they say uncle, then refill with 90weight, and go for a test drive.

The test drive assumes you are sober after all that beer. That is why procrastination is so very important to quality automotive work....

I'll let you guys know how it works after I hit something slippery.

Thanks for the help and for reading.
 
Holy hell... Well that was interesting. I had to wait around a few hours for the RTV to dry up enough to fill the diff.

When I went to refill it I discovered my damn transfer pump wasn't working anymore, so I punched a hole in the lid of my gear oil, hooked up a line and shoved it on top of the drive line and let it drip in... 2.5 more hours later about a quart and a half had trickled out...

So I busted out the air compressor, made another hole in the lid and pressurized the container.... took about 7 mins to get almost full, then a rolling blackout killed all power.. had to stumble around the new garage trying to find my damn flashlight (I am in the process of moving to a new house...part of why I need this diff when the snow comes.)

Luckily there was enough pressure left in the tanks to finish the job by electric candle light.

Drove it back to my old place, and it was noticeable on the twisty roads right away, it really is like night and day, can't wait to see how it does when I actually need it. :yahoo:
 
You think we wait to fill diffs after resealing covers? Install with RTV, run the cover bolts down with your air ratchet and fill with oil.
 
Good to know. I have always given rtv an hour before torquing it down. It was literally freezing here last night so I gave it time to cure a bit. :icon_thumby:
 
if you do get into a situation where you're 1 tire firing, because you've got one off the ground or such, put the ebrake on slightly, it will add "traction" to the wheel in the air, and allow the diff to transfer some torque to the other wheel
 
Drove it back to my old place, and it was noticeable on the twisty roads right away, it really is like night and day, can't wait to see how it does when I actually need it. :yahoo:

So you've had for awhile now - how do you like it? Did it dent your fuel economy?
 

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