Can you buy the 4.30 gears from Toyota?

Can you even get the 4.30's from Toyota? And what is the cost from them. I think that would be perfect for the automatic trucks with 265/75/16 tires.

 

Does yours feel more sluggish with the 265/75/16s from the stock size?

 

do you think you would you be totally happy in 4.3's? some have looked into the gearing inside the AT and suggest 4.56 or 4.88 is going to be the right choice. have you seen the thread on 4.88's? some discussion in there about it. just wondering if 4.3's in the AT will not give you the bang for your buck, and that's a lot of bucks, so...

 

I haven't put them on there because it barely has the power to stay in 6th gear now. 4.30's in the automatic would be nice

 

4.88s seem to be the choice for folks running...33s? Or 35s

 

Yes they are turning almost 3k rpm at 75mph with 285's. I think 4.88's would be to much with 265/75 tires. I don't want 285's on mine

 

What is stock? 3.9?

 

Here's the problem though with this transmission coming low on fluid and having one rear diff already replaced last thing I'd want to do is spend 1500 to 2000 on new gears only to realize it voids warranty on a good portion of the rest of the driveline (if not the entire thing)

 

Yes

 

correct, in the AT's. MT's are 4.3 final drive.

 

I can't see where they can say a gear change voids the warranty. They for sure wouldn't replace the gears but anything else I would think they would

 

I wish someone with a MT TRDOR would swap to 4.88 and ARBs so I can have 4.30 and an elocker for my little 2.7 (four cylinder ATs are 4.3 and four cylinder MTs are 3.9).

 

well speaking for myself i wouldn't do anything that drastic or expensive until i had at least 5kmi on it just to be a bit more confident in hardware issues.

 

I dont think 4.3 would make that much of a difference relative to the amount of work and price, especially only for a less than 1" taller tire. 4.56 would be a better choice, no?

 

If the transmission takes a dump at say 88k you go in to get warranty work done and they find out you regeared they might say "hey the extra strain of the non-OEM gears contributed to the transmission failure as its not designed to operate with this gear ratio" of course they could probably say similar for having oversized tires. If the dealer and corporate refuses to fix it are you really going to take the time and money to fight them in court citing the Magnuson Moss Act?

 

It might but they don't exist 4.30's do.

 

That doesn't worry me. No way a low gear puts more strain on the tranny it puts less

 

The OEM MT 4.3 will work in the AT?

 

I went from 4.10s down to the OEM size 3.55s in my 68' GTO. It did help on the freeway but didn't change much on the daily city driving performance. I mean you could definitely tell a difference but I wouldn't say it was Worlds Apart. Given that's an entirely different transmission Motor & vehicle altogether

 

In the off-road with the 8.75 rear. It will not in the sport with the 8" rear