db84drteg

iTrader: (2)

I bought an open 1.8 diff for my car from Planet Miata, but now I need to make my last payment for school. It's in good working order from what I can tell, but it's just the guts in the front half of the housing. It doesn't have the carrier to bolt it to the car. The gear ratio is 3.9:1.

$400 shipped, obo.

paul

iTrader: (21)

what the **** had a 3.90 open? no miata did.

Ben

iTrader: (33)

late 70s or early 80s truck... and while the r/p would swap, the actual diff assembly wouldn't.

since it came from PM, either
(1) they pulled the torsen from a 6-spd rear OR
(2) it ain't a 3.90 <--most likely

jasonrobo02

iTrader: (13)

I say show us some pics of the ring and pinion to verify tooth count.

db84drteg

iTrader: (2)

I just checked and it's 4.1:1. Guess that's what I get for trusting PM with anything important =\ Anyways, how's the price?

patsmx5

iTrader: (16)

Extremely high. You asked. I had someone off to GIVE me on a while back. GL getting 400 bucks for it.

db84drteg

iTrader: (2)

Well then, 250 shipped.

devin mac

iTrader: (2)

here's a question i SHOULD know the answer to... while i prefer to have a limited slip rear, my main concern right now is that when i get the new injectors in and start running more power, i'm going to make short work of my 1.6 rear.

the open rear should stand up to the power the same as a limited slip unit, correct, as the 6" vs. 7" ring is the factor at hand? this of course assumes i'm not rockin peg leg burnouts and drifting like it's going outta style. right?

db84drteg

iTrader: (2)

Yeah, you'll be good with this rear end. If I remember correctly, the 7" ring gears are good for at least 250hp.

MX5-4me

Yes, but he will need the bigger Diff housing, no?

db84drteg

iTrader: (2)

Yes indeed. The carrier (rear housing with mounts) will need to be sourced. On top of that, a driveshaft and axles (and perhaps the stub shafts) will be needed for the entire swap.