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Transaxle oil change

chrisg

chrisg

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Just about to drain and change the oil. Any recommendations (given the LSD) or suggestions ?

C
 
It's a pretty straight forward job though getting the new oil in is tricky. I used one of thost syringe things but found it wouldn't suck up the new oil so I had to keep unscrewing it to pour the oil into the syringe then assembling it to squirt the new oil into the transaxel. Very messy but very effective.
 
Whats THE best oil to use in the gearbox.?? WITH a LSD fitted?? And wheres the best place to get it from.???
 
Make sure you can undo the filler plug before you undo the drain plug and watch it all drain out only to find that the filler plug is seized [:mad:]
 
ORIGINAL: Big Dave UK

Whats THE best oil to use in the gearbox.?? WITH a LSD fitted?? And wheres the best place to get it from.???
Click to expand...

A lot of us use SWEPCO from Bert Gear at Berlyn Services - his number is in Porsche File under Register Technical Adviser.
 
ORIGINAL: sawood12

It's a pretty straight forward job though getting the new oil in is tricky. I used one of thost syringe things but found it wouldn't suck up the new oil so I had to keep unscrewing it to pour the oil into the syringe then assembling it to squirt the new oil into the transaxel. Very messy but very effective.
Click to expand...

Easiest method I found is to get a shortish length (6ft or so) of PVC tubing about 1/2" diameter and a largish funnel. Place the funnel on one end of the hose and feed the other end of the hose over the top of the rear wheel and into the filler hole on top of the gear box then simply hold the funnel at sufficient height above the gearbox while filling it with oil. No mess no fuss :)

Cheers

Dave K.
 
Make sure you can undo the filler plug before you undo the drain plug and watch it all drain out only to find that the filler plug is seized [:mad:]
Click to expand...

Promax noted mine was siezed so filled it via the reverse light switch I believe [8D][8D]
 
ORIGINAL: Big Dave UK

Whats THE best oil to use in the gearbox.?? WITH a LSD fitted?? And wheres the best place to get it from.???
Click to expand...

I'd recommend Snake Oil [;)]



Coincidentally I did mine on Wednesday - I used this:
http://www.merlinmotorsport.co.uk/FLUIDS-Gear-&-Diff-Oil/c56_2271/p6695/VALVOLINE-75W-90-LIMITED-SLIP-OIL/product_info.html

Managed to get the oil in fairly easily - you can get the bottles higher than the filler hole by squeezing them up past the back box & heat shield, then just pump it in.
Worth getting the oil warm before you start - rather than taking it straight off a cold garage shelf.

Finally - don't torque the plugs up too tight - IIRC they are tapered & liable to seize. Haynes says 18 ft lbs
 
I have no experience with the Swepco or Valvoline mentioned above but I have found Castrol XJ 75W140 very good.
A 75W90 may not help preserve gearbox bearings as well a 75W140, especially under hard use.
 
Lots of people swear by Swepco, but it is an industrial machine lubricant, not originally designed for cars.

I'm not knocking it; there are enough people around who swear by it, but it's damn pricey and I can't believe that it is *that* much better than everything else.

(Health Warning - I have never tried it, and may well be talking out of my hat.)


Oli.
 
Idiot question but of the top of yer collective heads what size key do I need to fit the plugs/bolts?

btw I have used swepco for some time and find that the shift is very good when warm but can be a bit stiff when cold. ISTR the swepco stuff is supposed to be very good at preventing synchro wear.
 
I've got Swepco and all seems fine so far. However i've recently read that some transmission oils are intended for clutch type LSD's and are different to those intended for normal open diff transmissions and Swepco is the type of oil that is intended for LSD. Are there any issues in using this type of fluid on non-LSD transmissions?
 
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