I purchased the PPG dogbox kit, and since I went to this extreme was wondering, what is the better/best center diff option? Anyways my 4 spider is not fitting in the housing!?

Contacting PPG about the issue.







People out there that have a PPG dogbox. Did this happen to you!?

What is the dimensional measurements of your center diff housing, and the dimensions of your speed design 4-spider cross shaft?

Magnus referred me to Jon at TRE. Jon said he will machine down the shafts. I guess that is needed for all 4 spider conversions. i didnt know that. And its in the mail right now!

http://www.teamrip.com/TRE_4_SPIDER_CENTER_DIFFERENTIAL_SERVICE.html

Yup, Jon can do the job. I would also recommend having him face the center diff inside for double spider washers so you will reduce the wear potential of the spider gears / washers into the differential housing. It has been a standard on all of my diffs for a couple years now and works very well.

Face? is that another word for re-shimming? I told him make it good enough for 1000hp so i hope he gets the idea

No, it is machining the center diff housing to use 2 spider gear washers per spider gear. 8x spider gear thrust washers are used instead of 4 on a regular 4-spider center diff.

Great i will pass that info along. Im guessing for more of a bearing effect? Wish i had a lsd option with the dog box.

It helps with reducing wear patterns on the spider gears and the center diff housing.

Dogbox, what do they go for?

It says to call for a price on the diff housing. Can you disclose publicly the price? Did you elect for the front diff spool or the straight cut dog engagement 5th gear? Any advice for those looking at purchasing a PPG set? How bad was shipping and such?