4.56/4.67/4.88 diff builds

[clay217]

Hi I am new here but not new to cars or the fr-s. I have done cheap mods to get the most bang for the $ and now it is time to do the diff build. I am having a hard time parting with $ for the brand name final gears as there's no reason for the price gouge. Which is better? who has done one and what one did you pick and like? I work at Toyota so I am going to cross reference different options but I see online 4.88 for $300-600 but cant find info if the final drive gear is a 7.5" or 8"? will the 4 runner 4.88 work? thanks for any help.

[TorontoNat]

Originally Posted by clay217

Hi I am new here but not new to cars or the fr-s. I have done cheap mods to get the most bang for the $ and now it is time to do the diff build. I am having a hard time parting with $ for the brand name final gears as there's no reason for the price gouge. Which is better? who has done one and what one did you pick and like? I work at Toyota so I am going to cross reference different options but I see online 4.88 for $300-600 but cant find info if the final drive gear is a 7.5" or 8"? will the 4 runner 4.88 work? thanks for any help.

I don't know what the ultimate purpose of your car is. Maybe a drift build? so I'm mostly just curious here on how these diffs you speak of are superior to the stock one? Do you have more power and the stock diff can't handle it? (Is that even possible)? From what I understand the diff is one of the best parts of these cars no?

[NoHaveMSG]

http://weirperformance.com/

Weir can set you up for a good price. I believe the R&P matches up with one of the early Supra's.

[Sportsguy83]

Originally Posted by TorontoNat

I don't know what the ultimate purpose of your car is. Maybe a drift build? so I'm mostly just curious here on how these diffs you speak of are superior to the stock one? Do you have more power and the stock diff can't handle it? (Is that even possible)? From what I understand the diff is one of the best parts of these cars no?

The only reason to replace the stock diff is for better gearing, shorter or longer gearing when compared to the stock 4.10. Unless you're making over 600ish TQ then you need a stronger one but that's a whole nother story.

[clay217]

Originally Posted by NoHaveMSG

http://weirperformance.com/

Weir can set you up for a good price. I believe the R&P matches up with one of the early Supra's.

yeah would be great if they ever replied, the have lost my business due to no returned calls or emails so i want other avenues. Mainly need info on final gears i suppose, are all cut the same? like if its an 8" can i use any 8"?

[clay217]

Originally Posted by TorontoNat

I don't know what the ultimate purpose of your car is. Maybe a drift build? so I'm mostly just curious here on how these diffs you speak of are superior to the stock one? Do you have more power and the stock diff can't handle it? (Is that even possible)? From what I understand the diff is one of the best parts of these cars no?

I dont have the $ for a turbo kit so this is a cheap way of making the na faster as its shortening the gear ratios for more torque to simply put it

[nextcar]

Toyota ring and pinion part numbers compatible with the FRS. Not all can be ordered in North America; I had to order mine from Japan. The only real problem with some of the third party gears is a bit of whine due to not all being helical cut.


3.58:1 - 41201-80125
3.73:1 - 41201-80050
3.91:1 - 41201-80052
4.10:1 - 41201-19605
4.30:1 - 41201-29606 (Included pinion seal will not fit)
4.56:1 - 41201-19557 (Included pinion seal will not fit)
4.88:1 - 41201-80183 (Included pinion seal will likely not fit) <= warning: fitment problems reported
5.13:1 - 41201-80300 (Included pinion seal will likely not fit)

Good luck.

...I went 4.56 with a MT, but sometimes I think I should have gone 4.88

[Teseo]

Originally Posted by nextcar

Toyota ring and pinion part numbers compatible with the FRS. Not all can be ordered in North America; I had to order mine from Japan. The only real problem with some of the third party gears is a bit of whine due to not all being helical cut.


3.58:1 - 41201-80125
3.73:1 - 41201-80050
3.91:1 - 41201-80052
4.10:1 - 41201-19605
4.30:1 - 41201-29606 (Included pinion seal will not fit)
4.56:1 - 41201-19557 (Included pinion seal will not fit)
4.88:1 - 41201-80183 (Included pinion seal will likely not fit)
5.13:1 - 41201-80300 (Included pinion seal will likely not fit)

Good luck.

...I went 4.56 with a MT, but sometimes I think I should have gone 4.88

Problem would be adding an installation kit + labor will affect the budget

[clay217]

Originally Posted by nextcar

Toyota ring and pinion part numbers compatible with the FRS. Not all can be ordered in North America; I had to order mine from Japan. The only real problem with some of the third party gears is a bit of whine due to not all being helical cut.


3.58:1 - 41201-80125
3.73:1 - 41201-80050
3.91:1 - 41201-80052
4.10:1 - 41201-19605
4.30:1 - 41201-29606 (Included pinion seal will not fit)
4.56:1 - 41201-19557 (Included pinion seal will not fit)
4.88:1 - 41201-80183 (Included pinion seal will likely not fit)
5.13:1 - 41201-80300 (Included pinion seal will likely not fit)

Good luck.

...I went 4.56 with a MT, but sometimes I think I should have gone 4.88

toyota ones are pricey, wonder can you use any 4.88 and are they a 7.5" or a 8" and if i do use a toyota one as long as its the same diameter teeth cound should be same? i know weir offers 2 choices in supra so which is it of the supra that works? th 1986.5 + or prior years, thanks guys this is a help

[mkivsoopra]

Originally Posted by clay217

yeah would be great if they ever replied, the have lost my business due to no returned calls or emails so i want other avenues. Mainly need info on final gears i suppose, are all cut the same? like if its an 8" can i use any 8"?

Sorry to hear that.. I have the their 5.29 and it's working well. They were generally pretty responsive when I have called/emailed them in the past.

[fika84]

I agree with this ^^. I have their 4.88 and it's built perfectly and quiet. I think it's just Spencer that does everything, so you need to give the guy a break. He's probably busy

[clay217]

Originally Posted by clay217

toyota ones are pricey, wonder can you use any 4.88 and are they a 7.5" or a 8" and if i do use a toyota one as long as its the same diameter teeth cound should be same? i know weir offers 2 choices in supra so which is it of the supra that works? th 1986.5 + or prior years, thanks guys this is a help

4.88:1 - 41201-80183 is not a toyota part # also what did you do for an install kit as my parts manager is looking and all the gunk is different, thanks

[clay217]

Originally Posted by fika84

I agree with this ^^. I have their 4.88 and it's built perfectly and quiet. I think it's just Spencer that does everything, so you need to give the guy a break. He's probably busy

i have been trying for a year.....

[fika84]

Originally Posted by clay217

i have been trying for a year.....

Dang! Well hopefully it comes around. Are you reusing the 86 carrier? Or getting an IS300 one?