Cresta diff conversion?

[BlackBedford]

I've got one of these conversions in mine and when I ran the 186 with trimatic it still used to rev pretty high at 100k.

See, told you so!

[ben]

hey chris. you said early model diff..

so would i be right in guessing that the early diff had 9 inch drums and the later model diff had 10 inch drums? or is the 10inch drum diff just a special that came with some?

most of the diffs i see have 9 inch drums

but i own 3 10 inch drum diffs now just after saying that..
cheers
ben

[Jeff]

This works only with the SWB as those models have the fine splines. The LWB has coarser splines, and is a different diff.
I was very happy with my first Beddy which I put one in with a slant Valient motor.
My current van has one also, and with the LD28 is about right.

[Bas NZ]

Hay Rogue, you have to use the drive head from an auto only as they are 3.5, Man- is 4.1, so no good. I changed my over myself, placed it in the vice and greased the crown wheel, and turned it until you got any even patten transfering on to the pinion, 5 years later still good.

[Rogue Trooper]

I didn't actually do the conversion myself. I swapped the diff with another club member many many moons ago. I think the problem was more that I was comparing it with the car which is a 5 speed manual whereas the van at the time was running the 3 speed traumatic. It was definitely better than the original diff.

I am so looking forward to running a 4 speed auto behind the V6 with a 3.07 ratio.

[waikatostocky]

'ben mate all the 9" drums must of gone to Oz then i got a creasta conversion done on a 9" drum housing and now i carnt find any drums to go on it dam hate that lol.

cheers Paddy

[Rogue Trooper]

The original diff in mine was the 10" however the Cresta conversion came on a 9". Keep an eye out at the wreckers. We've had quite a few CF's through Pick-A-Part down here over the last couple of months.

[waikatostocky]

have been droping into quit a few yards i know a few of the lads in wreakers up this way from when i was raceing the stockcar.

havent had much luck yet lol.

Cheers Paddy

[Jeff]

There's one on TradeMe . A bit pricey @ $400 buy now.
http://www.trademe.co.nz/Trade-Me-Motors/Car-parts-accessories/Performance/Other/auction-264288506.htm

Hey Paddy, Can't you fit 10" brakes to it?

[cfjeff]

Paddy are you looking for 9" cf rear drums, if so I should have plenty in my diff and gearbox shed. If you like I will have a look tomorrow. Just to be clear we are talking about the same thing the 9" brake diffs have 4 bolt backing plate and the 10" 6 bolt backing plate?

 When I recently rebuilt my diff and needed to replace the crown wheel and pinion as mine was too worn. I found a diff on the west coast, the only problem was I had 10" brakes on my diff and the diff I purchased had 9". So I pulled the guts out and swapped the interiors. I still have all the left over parts in my shed. Only prob is I'm in christchurch.

Let me know if I can be of help,
Cheers Jeff