1989 thirds in a 1998 Tacoma?
#1
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Thread Starter
1989 thirds in a 1998 Tacoma?
Quick question before I sell some guy parts that will not work. Correct me if I'm wrong here.
The IFS on a 98 Tacoma is reverse rotation so an 89 IFS will NOT work in there?
The 8" rear on the same Tacoma has a different carrier assembly so the 89 rear will not work in there either?
Thank you for your time and patience.
The IFS on a 98 Tacoma is reverse rotation so an 89 IFS will NOT work in there?
The 8" rear on the same Tacoma has a different carrier assembly so the 89 rear will not work in there either?
Thank you for your time and patience.
#2
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I'm no expert but have done some diff research and some diff work. My understand is the same as yours.
The IFS on a 98 Tacoma is reverse rotation so an 89 IFS will NOT work in there?CORRECT, the 7.5 diff on the tacoma and 4runners are reverse rotation.
The 8" rear on the same Tacoma has a different carrier assembly so the 89 rear will not work in there either?
CORRECT, the 98 tacoma has a "8.4" ring with a "strap" on the carrier bearing cap. The 89 rear would work on a 98 4runner, however.
The IFS on a 98 Tacoma is reverse rotation so an 89 IFS will NOT work in there?CORRECT, the 7.5 diff on the tacoma and 4runners are reverse rotation.
The 8" rear on the same Tacoma has a different carrier assembly so the 89 rear will not work in there either?
CORRECT, the 98 tacoma has a "8.4" ring with a "strap" on the carrier bearing cap. The 89 rear would work on a 98 4runner, however.
#3
Registered User
I am sure you've seen this but just in case does this help?
http://home.4x4wire.com/erik/diffs/
All 2wd and 4wd T100's, '00-06 Tundra's, and ?? Sequoia's use a newer/stronger 8" 2-pinion diff. Tacoma 4x4's and Tacoma PreRunner's that don't come with the electric locker (aka "non-TRD), as well as V6 Tacoma 4x2's also came with this diff.
This diff commonly and mistakenly called an 8.4" or 8.25" diff, possibly to imply its extra strength. The ring gear actually measures 8". The extra strength of this diff comes from the bearing cap/truss and large diameter pinion gear shaft.
LSD's available is the TRD/Kazuma clutch-type 3-pinion LSD, the OEM 4-pinion Tundra TRD LSD, and the Detroit Trutrac.
Lockers available are the Powertrax "Lock-right," "No-Slip," ARB Air Locker, Detroit Softlocker.
This diff cannot be fitted to an older style 8" axle because it uses a larger diameter mounting bolt pattern and because more space inside the housing necessary to accommodate the large bearing cap. The different bolt pattern also makes it very impractical to swap in an electric locking Toyota diff (the whole mounting flange would have to be re-done using a special jig).
- Carrier bearing truss and newer housing adds significant strength over V6 and 4cyl diffs
- Uses V6 carrier bearings, larger pinion bearings
- Uses shims for backlash adjustment instead of threaded adjusters
- Twelve 12mm Ring gear bolts
- 10mm axle housing studs with 14mm nuts
- 30 splilne axles
- 30 spline pinion
* 4Runners do NOT use this diff at all. Late-model 4Runners still use the V6 8" diff above.
** This diff is NOT swappable with V6, 4cyl, high-pinion, or electric locking diffs. This diff cannot be fitted to an older style 8" axle because it uses a larger diameter mounting bolt pattern and because more space inside the housing necessary to accommodate the large bearing cap.
This diff commonly and mistakenly called an 8.4" or 8.25" diff, possibly to imply its extra strength. The ring gear actually measures 8". The extra strength of this diff comes from the bearing cap/truss and large diameter pinion gear shaft.
LSD's available is the TRD/Kazuma clutch-type 3-pinion LSD, the OEM 4-pinion Tundra TRD LSD, and the Detroit Trutrac.
Lockers available are the Powertrax "Lock-right," "No-Slip," ARB Air Locker, Detroit Softlocker.
This diff cannot be fitted to an older style 8" axle because it uses a larger diameter mounting bolt pattern and because more space inside the housing necessary to accommodate the large bearing cap. The different bolt pattern also makes it very impractical to swap in an electric locking Toyota diff (the whole mounting flange would have to be re-done using a special jig).
- Carrier bearing truss and newer housing adds significant strength over V6 and 4cyl diffs
- Uses V6 carrier bearings, larger pinion bearings
- Uses shims for backlash adjustment instead of threaded adjusters
- Twelve 12mm Ring gear bolts
- 10mm axle housing studs with 14mm nuts
- 30 splilne axles
- 30 spline pinion
* 4Runners do NOT use this diff at all. Late-model 4Runners still use the V6 8" diff above.
** This diff is NOT swappable with V6, 4cyl, high-pinion, or electric locking diffs. This diff cannot be fitted to an older style 8" axle because it uses a larger diameter mounting bolt pattern and because more space inside the housing necessary to accommodate the large bearing cap.
95-03 Tacoma, '00-04 Tundra, ?? Sequoia's, and 96-02 4Runners have a high-pinion 7.5" IFS front diff offset to the drivers side. The high-pinion design is used so that the rack and pinion steering and anti-sway bar on these vehicles can run under the front driveshaft. The housing is a unique bolt-together design. The carrier inside is exactly the same as the '86-95 IFS diffs, so LSD's and lockers for it are also the same. However, since this is a high-pinion diff, the gears for it are different (reverse-cut) than the earlier diff. There is an ADD and non-ADD version of this diff as well.
These diffs use different gear sets than the earlier IFS diff because of the high-pinion design.
- Driver's side
- High pinion
- 27 spline axles
- Bolt-together "clamshell" housing design.
These diffs use different gear sets than the earlier IFS diff because of the high-pinion design.
- Driver's side
- High pinion
- 27 spline axles
- Bolt-together "clamshell" housing design.
Last edited by xxxtreme22r; 04-19-2011 at 07:41 AM.
#5
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Thread Starter
I have a 4:10 rear and 4:10 IFS that I pulled out of my 89 4runner up on Craigs List here in Albuquerque. A local fellow wants to buy them to swap into his 1998 Tacoma and I didn't want to sell him something that he couldn't use.
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