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Discussion Starter · #1 ·
So I have a 2002 5 lug 2.4 with the 7.5" rear and want to get a True Trac to get some real traction going. I was looking through the True Trac catalog and only see one listed for the front, can anyone confirm if this will fit in the rear by chance?

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I had a "gear specialist" tell me it will, but I would like to double check before ordering up the parts!

First post on customtacos, thank for all the inspiration you have all given me and my truck Trudy!

135706
 

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I wish I had the part number to prove it, but I bought an assembled 3rd member from @Chris D. many many years ago and have had no problems with the Tru-Trac unit itself. (destroyed the ring and pinion gears, but that's another story). I friggin love the thing. Very predictable and makes corning much more fun.
 

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Mambeau / Admin
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You do NOT want either of the 7.5" TrueTracs listed for Toyota front differentials.

The TrueTrac for the 7.5" rear differential is an 'off-list' model that Detroit Locker didn't list for the Tacoma:

911A565

This was usually listed as a 'Toyota Legend Race Series' differential with no specific claims as to which years / models it fit.

This was the specific model involved in the big CT TrueTrac group buy years and years ago. To verify this is the one you want see:



Unfortunately, I can't seem to find this part number in the current Eaton catalog, and I don't know what its absence may mean.
 

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Discussion Starter · #4 ·
Thanks for chiming in guys!

I came across that part number 911A565 googlin around, but it does not seem to be for sale anywhere any longer. Looks like it was listed for a Celica?legend, which I have seen others slap int their 5 lugs alright.

Can you please elaborate on how you know the part suggested will not work?

I did find a some info stating the front and rear diff parts including the LSD were interchangeable front to rear.

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Again thanks for any info you can lend guys!
 

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Discussion Starter · #5 ·
The same site shows a bunch of True Tracs and parts numbers, with interesting notes on what they fit.

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Interestingly the 911A565 is listed for 7.5 and 8.4 rears. Note "n" fits "large" hub bearing 50mm.

The 911A342 is listed for 7.5 Front IFS for a few years and models too. Note (m,n) Will not fit selector on the fly, fits "large" hub bearing 50mm.

They are all 27 spline, seems there may be more interchangeability in these diff's than we may have thought or what am I missing?
 

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Mambeau / Admin
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The gears in the ones designed for front usage are reverse-cut (i.e., the opposite of what's needed for use in the rear).

The bearing issue is mentioned in the threads to which I referred you. Rummage around in the past threads for more info.
 

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Discussion Starter · #7 · (Edited)
For reference I did read the "final word" stating one guys said "all front IFS are reverse cut" but it seems there are both reverse cut or standard rotation if I am reading things correctly..

Such as the 911A342 the "guy" I talked to said it would work, see IFS standard rotation:
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And did you see that nifty compatibility tab, here is what is lists it works for:
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Here is some info listed on the 7.5 IFS stating it came in either reverse OR standard rotations. The details state there is compatibility with some rears too.
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I must admit I am not 100% sure if the "reverse cut" (per final word) means the same as reverse rotation vs standard rotation, just sharing my thoughts and wondering if this sounds correct!?
 

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Mambeau / Admin
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In one of the threads I referred you to it's stated that the front versions didn't hold up if installed in the rear. Maybe it has something to do with the reason you need to install the alternative bearings.
 

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Discussion Starter · #9 ·
I would gladly get the diff you mentioned for the rear if I could find it anywhere. Even though the guy said the bearing must be swapped to make that one fit the 4 cylinder 5 lug.

It also looks like flipping the gears may be needed when putting a front diff in the rear.

I really have no idea why a front may be weaker than a rear version, but again I dont think I have too many options left at this point...

Thanks again for your help here, it is really confusing looking at hordes of contradicting info on this!!
 

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Just throwing out another option here. This is cheaper and has more availability. The 8.8 from a Ford Explorer comes with LSD, a few different gearing choices, and disc brakes. I got one from the Junkyard for $180. It mounts directly to the Tacoma leafs. You will need a U-joint bracket from a Ford Ranger (get it at the same junkyard). It bolts to the 8.8 and fits the U-joint on the Tacoma's driveshaft.
 

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Discussion Starter · #13 ·
I was able to have my local gear specialist install the TrueTrac as mentioned above yesterday. Recall this was part #911A342 that actually had a part #911A644 printed on the diff itself!

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He stated it was set up with proper rotation to use in the rear so didnt need to flip anything. Also mentioned all the parts I purchased worked out for the installation.This was basically all oem stock parts used for the full rebuild with the exception of running the "larger 50mm" diff carrier bearings. Here was the parts list used:

OEM Part numbers:
50mm Differential carrier bearings (not stock, v-6 parts)9036850006 x 2
Pinion bearing9036630055 x 1
Pinion bearing903663502377 x 1
Pinion seal9031138047 x 1
Ring gear bolts9010111353 x 10
Pinion Nut9017918020 x 1
Crush sleeve4123122010 x 1
Differential housing gasket4218130020 x 1

Now I just need to go for a "spirited" drive to see how this thing works!
 

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Mambeau / Admin
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Glad to hear you got it installed and it was the right diff (regardless of the part number weirdness).
 

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I was able to have my local gear specialist install the TrueTrac as mentioned above yesterday. Recall this was part #911A342 that actually had a part #911A644 printed on the diff itself!

View attachment 135726

He stated it was set up with proper rotation to use in the rear so didnt need to flip anything. Also mentioned all the parts I purchased worked out for the installation.This was basically all oem stock parts used for the full rebuild with the exception of running the "larger 50mm" diff carrier bearings. Here was the parts list used:

OEM Part numbers:
50mm Differential carrier bearings (not stock, v-6 parts)9036850006 x 2
Pinion bearing9036630055 x 1
Pinion bearing903663502377 x 1
Pinion seal9031138047 x 1
Ring gear bolts9010111353 x 10
Pinion Nut9017918020 x 1
Crush sleeve4123122010 x 1
Differential housing gasket4218130020 x 1

Now I just need to go for a "spirited" drive to see how this thing works!
Hey 2Runner, nice seeing you here on CT.
 

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Hey 2Runner.
Thank you for the detailed information regarding your adventure on the LSD install you did on your truck.
I have a 1993 Toyota Truck 2WD with the 7.5 rear differential. I too have searched high and low for the 911A565 but to no avail. Seems your truck with the bearings and other miscellaneous parts had no issues with the 911A342 and just wondering how it's been riding since the install.

Thank you,
Michael
 

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I was able to have my local gear specialist install the TrueTrac as mentioned above yesterday. Recall this was part #911A342 that actually had a part #911A644 printed on the diff itself!

View attachment 135726

He stated it was set up with proper rotation to use in the rear so didnt need to flip anything. Also mentioned all the parts I purchased worked out for the installation.This was basically all oem stock parts used for the full rebuild with the exception of running the "larger 50mm" diff carrier bearings. Here was the parts list used:

OEM Part numbers:
50mm Differential carrier bearings (not stock, v-6 parts)9036850006 x 2
Pinion bearing9036630055 x 1
Pinion bearing903663502377 x 1
Pinion seal9031138047 x 1
Ring gear bolts9010111353 x 10
Pinion Nut9017918020 x 1
Crush sleeve4123122010 x 1
Differential housing gasket4218130020 x 1

Now I just need to go for a "spirited" drive to see how this thing works!
Thank you for providing this parts list! ~$300 in OEM parts!o_O
 

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Hmm. Goldy getting an upgrade? So this is the 911a644 drops in? Whats the chances on a 97?
I like the Ford idea, and it's drop in almost easier to swap the whole shebang and not have to set up gears(been few years since I tackled that) but I'm questioning getting the brake bias right and residual line pressure on the brakes
 

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Hmm. Goldy getting an upgrade? So this is the 911a644 drops in? Whats the chances on a 97?
I like the Ford idea, and it's drop in almost easier to swap the whole shebang and not have to set up gears(been few years since I tackled that) but I'm questioning getting the brake bias right and residual line pressure on the brakes
It should, I have the same one in my 2000 reg cab 5 lug, which I bought off @Chris D. Way back. His truck was an 01-04 (don't remember the exact year but his was an extended cab). But Toyota has used the 7.5 diff for a long time. Even all the way back to pre-taco days.
 

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97 2.4l extra cab manual trans #🌮⏳
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K... I'm liking this.
Need to look into the lsd a bit more and decide if I can do it then work the family budget around my Goldy's rear end
 
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