Quaife LSD on early 944?

Aslet · 10-16-2010, 05:34 PM

Can a Quaife LSD work on a early 944 trans? It says '86 and newer 944s on the site. Was there any real changes to the transmission on the late model 944 or in '86? The mounts changed I believe, that it?

If I can't get a Quaife, any recommended LSDs (track/autocross car)?

Thanks

smokin_944 · smokin_944's Garage

Randy, for about 750 bone or so you can buy an entire early transaxle with LSD. I thought there was one here in the used parts section for that kind of coin.
LSD Transaxle from 1983 Porsche 944 $650 + shipping

Cocacolakidd · Cocacolakidd's Garage

It's not the external case that is different, it's the gearing and ring and pinion that are different inside that will not allow the early and late parts to interchange...

Aslet · 10-17-2010, 05:12 PM

Would a late tranny directly bolt onto an early car?

Other that the original LSD, are there any options?

962porsche · 10-17-2010, 05:40 PM

the stock trans you want are 016K with codes 8Q , 4M or 7V . trans 016J with codes 5Z and ASH , . the late trans do bolt into the early cars . if your car is an 8v do not use a turbo , S2 or S trans . the S uses the same finel drive 9:35 but the 5th 35:29 gear is taller than the 8v trans . the turbo and S2 use the same trans with 5th gear being 35:29 and final drive 8:27 . the gearing in the trans you want is . 37:27 5th with a 9:35 final drive . to know which trans is which look on the top of the trans bellhousing .

matthewb · 10-17-2010, 08:07 PM

I am not sure why you would not be able to put the lsd in your early transmission. I have personally taken an early lsd unit and put it into a late transmission. Maybe you should contact them and see if their is a reason it won't work.

porsche4life · porsche4life's Garage

LSD? I want lsd!

What would need to be done to put this in a non LSD tranny?

smokin_944 · smokin_944's Garage

I don't get it. A complete early LSD trans available for less than the cost of the LSD itself! Am I missing something??

Dantilla · 10-18-2010, 04:06 PM

Quote:

Originally Posted by smokin_944

I don't get it. A complete early LSD trans available for less than the cost of the LSD itself! Am I missing something??

The clutch plates in an LSD unit are a wear item. It's very difficult to know how much life is left in a used unit. When completely worn out, it will act as an open diff.

I'm going to freshen up the syncros in my 944 race car's tranny, and will probably purchase a brand-new LSD unit.

Aslet · 10-18-2010, 06:06 PM

And some of the new LSDs are better than the 25 year old models.

ecostellodo · 10-18-2010, 06:19 PM

Transaxle - General Information, Codes, and Gear Ratios

will help if you with the codes

eric

smokin_944 · smokin_944's Garage

Quote:

Originally Posted by Dantilla

The clutch plates in an LSD unit are a wear item. It's very difficult to know how much life is left in a used unit. When completely worn out, it will act as an open diff.

I'm going to freshen up the syncros in my 944 race car's tranny, and will probably purchase a brand-new LSD unit.

Thank you. That is the explanation I was looking for. I was unaware they could wear out.

banana944 · 10-19-2010, 06:18 AM

Randy late gen trannys will work just fine, your just going to need to swap your early gen tranny mounts.

924RACR · 10-20-2010, 04:07 AM

Easier to swap the whole trans than install the diff - much precision shimming work required, major PITA.

I'm dying to know why Quaife don't list their unit for the early cars; seems like everything's interchangeable across the Audi boxes... I'm running a factory LSD (worn out but with Redline in the trans to fix that) from a 951 in my early 924 with a 5-speed from the 81-82 924... bolted right in...

smokin_944 · smokin_944's Garage

From the research I've done, it seems the Quaife is the unit to get. What would a shop charge to install one in a turbo transaxle?

Aslet · 10-20-2010, 11:03 AM

It is a good LSD and with gears and no clutch, it will not wear out. I think I will try to contact them about it and why it won't work in the early trans. The LSD unit that 944online sells has the same part number for the early and late trans. So if that one fits both, why wouldn't the Quaife...

Dantilla · 10-20-2010, 12:28 PM

The Quaife/gear type LSD will not wear out, and is the preferred unit for autocrossing.
The factory type, with clutch plates, is preferred for race cars and/or track duty.

krystar · 10-20-2010, 12:45 PM

a quaife torsen style LSD and a clutch pack LSD are fundamentally different types of differentials.

disadvantage of quaife is that it doesn't have adjustable lockup. and that its locking on acceleration only. and if one of the drive wheels completely loses traction, it'll act as an open diff.

advantage....u never have to replace clutch discs