George Klass

Found a really good deal on a complete 87 9 bolt disc rear for my car. I've been searching like mad for the past few days but want to be 100% sure before I start ordering parts.

For the handbrake cables and brake hose (rear right) do I order for a 1987 disc car and they will bolt in to my 89?

For the proportioning valve I guess I'll have to check my car for right thread. She was built December 88 so could still be M1.0? If it is the 82-88 (early 89) should be fine?

Thanks!!

Drew

iTrader: (58)

Cast iron calipers? Hard pass. I'd put the stock drums above the Delco-Moraine iron caliper rear discs. The drums are more dependable, consistent, cost effective, and easier to maintain.

Now if you were asking about the PBR rear discs, that'd be different.

George Klass

It was more for the gears and to have a limited slip. I wish it was a PBR rear lol. It's complete and only $150

George Klass

Hey Drew,

I decided to pass on the 9 bolt. Found a drum 10 bolt for $250. The seller claims it has 3.73s (he got it with a car he bought) I think it's too much gear for my TBI weakling?

He just text me some pics. I'm trying to figure if it's 3.73s. Hopefully it has 3.23s. Would you happen to know?

x100 thank yoU!

Drew

iTrader: (58)

2.73. 15:41 = 41/15 or 2.7333333333333

Definitely not worth the asking price unless you REALLY need a rear. A 3.73 gear actually wouldn't be too terrible behind TBI, it doesn't have the limited RPM range of TPI, so it'd just be higher RPM, especially on the highway.

Personally I'd shoot for a 3.23 or 3.42 gear set. V6 cars all got those ratios, but they're also usually open differential drum rears. Changing the carrier solves the open carrier problem, but setting up used gears on a new carrier might be a bit tricky. If you're going to change the carrier and gears, might as well change all the bearings, and rebuild the entire rear end. At that point, the donor rear axle assembly should be cheap because most of the internals won't be used anyway.

George Klass

It's actually $191 USD haha! Now that's it confirmed 2.73 it's useless for me. Ideally I would want a 3.23 or 3.42 like you mentioned. I found one in an IROC (3.23) but the owner is making it a little difficult to have it removed off the car.

MikeP_82

I have a 3.23 rear end in unknown condition, no brakes on it (setup for discs though). About 1 hour West of Toronto.