6 speed trans mod ?????

I know is a common assumption that the manual trans a taller 6th gear for highway driving ( I realize there are guys that love it) . But for the most part all I tow is a trailer full of motocross bikes and gear. I was wondering if any one has replaced that gears in the trans. to make it taller ( 2wd guys have their options) but i dont want to change the gearing in the diffs but was just wanting to see if i could do it threw the transmission ? And it might be impossible but ive done it in transfer cases of samurais ? Any help would be appreciated

 

Dang, No suggestions?

 

taller tires

 

What size tires would I have to use to compensate for that gear. If I want to got 75 to 80 and be around 2k ... I'm thinking I would have to use pretty tall tires lol.???

 

I don't see any applications on their website for Toyota. I've run that unit on 4x4 rigs in the past with very good results. It's a hydrostatic unit similar to an automatic.

 

I would like to change 1st, 2nd, 3rd and 6th. In theory gear swapping may be possible, but to my knowledge nobody has done it. This 6 speed is used in other applications and most likely has different gears. Those gears and related parts may be transferable. The problem is, nobody knows for sure. You would have to research the other options to find donors. You would probably also have to buy the transmission so you could study how the gears fit in the transmission and determine which other parts would have to be swapped with them. You might end up with one or two donors and probably a spare tacoma transmission as well. Maybe 6-10K worth of transmissions, and you may discover that they won't transfer at all! Of course if you did get it to work you could always come on a forum and tell everyone else how to do it for free . I think that is why you aren't getting much response.

 

I've heard that it's used in some other domestic car(s), but I can't recall which ones. Of course it would be different becuase of the transfercase, but the internals could be similar.

 

Some CTS V6 and the new Camaro V6 use the Aisin AY-6. Poor Camaros, it's as clunky as ours only they must have cheapened out somewhere else because if you look on certain forums there's people on their third transmission before reaching 15k.

The final drive on the Camaro is a little taller, something like 0.80:1 instead of 0.84:1. Too bad it isn't something in the low 0.7s because then it would be worth checking out.

Although, I read somewhere that Aisin doesn't let you buy many tranny parts domestically which would throw ordering up a new gearset out the window.

 

You'll be shifting down if you tow in 6th with higher gearing works good on the road towing with the gearing it has now. Might be a good ideal to check your trailer tires too most are rated 65 MPH max.

 

Yea good point, I always do about 80 MPH but never think about the trailer tires lol maybe I should just slow my but down and quit worrying about the MPG @ 99 MPH lol