Can someone give me to do's and don'ts of swaping out the "chunk" in the rear-end- We are going racing next weekend and I want to be able to change the "chunk" if need be... Is it as simple as pop the axles out... unbolt the chunk put the desired ratio in and "vwla" new ratio?...

 

are you talking about swaping pumpkins or ring and pinyon?

 

ring and pinion.

 

Not as simple. The ring and pinion have to be properly set up with correct clearances and such so they don't self destruct. If you don't have a factory manual, get one for the how-to.

If you want a relatively easy swap at the track, get an extra center section or "chunk", set up the alternate R&P in it, and then do the swap as you suggest.

How quickly do you need to do this? Overnight? Same day between sessions?

 

Ok- I think we have gotten lost somewhere. I have different ratios that are in the carrier. I am just talking about replacing the center section. Popping out the axles.... pulling the 10-15 bolts and taking the whole carrier out and installing the new carrier and ratio. I belive it is what your calling the pumpkin!

 

In that case, somewhat time consuming but doable at the track. My tips would be:

- Do it at home once to make sure everything comes apart and goes back together as planned. You don't want to spend time at the track learning how to do it while under presssure to make the next session.
- Bring a slide hammer with you to make it easier to pull out the axles.
- Be careful pulling the axles as you don't want to have to put in new axle seals every time
- Find silicone sealer that cures quickly so you can fill the axle with lube.
- Get an electric impact or ratchet of some sort to speed taking out / replacing bolts

 

Are you a SCCA racer also? Coming to the ARRC?