Diff Ratios And 5 Speed Gearboxes

[Maztrix]

Hi, i have a completely stock KE20 and am looking at changing the diff ratios and putting a 5 speed gearbox in.

 

At the moment the car is revving its guts out doing 100kms and i want to do some long distance driving in it and travel in 100km zones every day.

 

What would be the best diff to put in and what car will i find it in?

 

What car can i find a 5 speed gearbox in that will bolt straight into my car?

 

Thank you

 

Daniel

[irokin]

A 5 speed gearbox will give you over drive with a ratio of 0.865. I did a 5 speed conversion in my KE20 (Here) way back when. I like the KE70 box length, even though you have to cut a bit of tunnel away to fit the shifter in. The shifter position is just right (for me anyway). I think the KE55 boxes are slightly shorter, but by how much I don't know.

 

The gearbox conversion should make highway driving a little more bearable. I would try and avoid going for a lower ratio diff because the 3K doesnt have the torque to cope with it. Do the gearbox first, then see how you go.

 

Gearboxes in the FAQ: http://www.rollaclub.com/faq/index.php?title=Manual_Gearbox

[Maztrix]

Thanks irokin

 

Will i have to change the tail shaft aswell?

 

And what is a KE70 Gearbox worth?

 

Cheers

 

Daniel

[irokin]

Standard KE20 tailshaft fits fine. Its possibly a bit short/long but I never experienced any problems. I payed $150 for a rebuilt one a few weeks back. Around $100 is the usual going price.