Quick 6.7" / 7.5" Diff Ratio Question

[yellowsnow4free]

Hey guys,

So my car has a 6.38" diff in it, 3.91:1 ratio.

I like the idea of the 6.7" swap due to LSD and rear disc brakes, but I don't want to have a higher rear end ratio.

Is there a factory 6.7" or 7.5" LSD with a ~3.91:1 ratio available in the US? I know there's a super rare 6.38" LSD but it's only in Japan or something.

Thanks!

[MisterJerk]

3.9 is available for 6.7" rears. Originally made for the HiAce van.

Weirperformance carries them or you could get the million dollar one from toyota.

[chohdog]

http://store.uslegendcars.com/site/prod ... C181F96C9F

Legends cars use a Toyota 6.7. This looks right up your alley.

[yellowsnow4free]

3.9 is available for 6.7" rears. Originally made for the HiAce van.

Weirperformance carries them or you could get the million dollar one from toyota.

http://store.uslegendcars.com/site/product.cfm?id=20ED2128-B0D0-791A-6592CD47A2F8D5CD&dept_id=622E4D39-B0D0-791A-65FCD7C181F96C9F

Legends cars use a Toyota 6.7. This looks right up your alley.

Thanks for the replies

MisterJerk,

I looked up the Toyota HiAce and I don't think it was available in the USA; are you referring to the 80's "toaster" vans? http://www.toyotareference.com/van
Also, since I'm super new to LSDs (this is what happens when you drive a SR5! ) is the HiAce diff you mentioned an open diff or a LSD?

chohdog,

You're right, that does look right up my alley But I'm cheap and would rather go with an OEM junkyard solution than spend $250 Glad to see there is an aftermarket option though

Another question:

This sounds like a PITA, but can you take any 6.7" LSD unit and change the final drive gear(s) to a 3.9 unit? It looks like you can, but (being new to LSDs) I wasn't sure if you have to swap the whole unit or not.

Thanks!

[MisterJerk]

not the diff, just the Ring and Pinion gears.

http://weirperformance.com/finaldrivegears.html

Ratios: 3.91, 4.11 Ratios $318.60

[yellowsnow4free]

not the diff, just the Ring and Pinion gears.

http://weirperformance.com/finaldrivegears.html

Ratios: 3.91, 4.11 Ratios $318.60

Awesome

Thanks for the info MisterJerk