RAN swap to RAT for lower first gear

[rjrobin2002]

Has anyone swapped from the RAN 3spd 2.99 first gear to a RAT 3spd 3.41 first gear? Is there a big improvement in a underpowered 6 cyl?

 

[broncodriver99]

If the I6 is original it should have had the 3.41 gear from the factory. Unless someone swapped in a V8 tranny.

 

[rjrobin2002]

I do not have the drive train, I am just wondering if anyone has switched a 2.99 to a 3.41 first gear and if the reduction was a big improvement when dealing with a 6 cyl.

 

[Boss351]

It will make a difference. THINK of it this way 2.99 rear end gear or 3.41 rear end gear

 

[rjrobin2002]

It will make a difference. THINK of it this way 2.99 rear end gear or 3.41 rear end gear

It does seem like a big difference when you look at it that way. Like 4.10 to 4.56 gears.

 

[broncnaz]

I think RAT trannys only came behind V8's in broncos. RAN and HEFs came behind either engine but my interchange manual could be wrong but bottom line is that case ID wont nessarily tell you the gear ratio it has. Basically you need the short output shaft version for 6cyl application it will have the lower gear in it. Not sure on the exact lenghts of the ooutput shafts but the 6 cyl version should be close to 6in while the V8 version is closer to 9in.
And yes you want the lower geared version for a 6cyl they need the extra gear as they dont have as much torque on take off thats also why 6cyl vehicles tend to come with lower axle gearing as well.
The stock 3 sp gearing leaves a lot to be desired so I'd definitely want the lowest gearing I could get.