GL-5 Trans oil, Recommended Trans Oil |
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GL-5 Trans oil, Recommended Trans Oil |
BeemerSteve |
Mar 7 2016, 06:34 PM
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#1
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Member Group: Members Posts: 239 Joined: 2-September 15 From: Van Zandt, Wa Member No.: 19,123 Region Association: Pacific Northwest |
Hello all,
Without a long discussion on trans oil I know to you use GL-5 but should it be Dino oil only or can you use synthetic as well. Also, someone mentioned to me that add a GM manual trans additive along with the GL-5. Any thoughts will be appreciated. Thanks everyone! Steve |
Mike Bellis |
Mar 7 2016, 07:12 PM
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#2
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None |
Dino only. Cheapest you can buy will work fine.
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Mark Henry |
Mar 7 2016, 11:44 PM
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#3
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Buy it cheap, but change it often is the doctors advice.
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r_towle |
Mar 7 2016, 11:53 PM
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#4
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Custom Member Group: Members Posts: 24,588 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
Actually, the factory recommends GL-5 .
I use dyno oil, changed every couple of years because I change stuff... |
screenguy914 |
Mar 8 2016, 03:53 AM
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#5
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Member Group: Members Posts: 249 Joined: 6-July 09 From: So. Cal Member No.: 10,540 Region Association: Southern California |
Swepco 201 Multi-Purpose Gear Lube. Ideal for Porsche synchros.
Sherwood |
tomrev |
Mar 8 2016, 06:32 AM
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#6
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Member Group: Members Posts: 231 Joined: 25-February 14 From: N. Mich. Member No.: 17,037 Region Association: None |
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scott_in_nh |
Mar 8 2016, 09:31 AM
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#7
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Senior Member Group: Members Posts: 808 Joined: 10-December 10 From: Hampton, NH Member No.: 12,471 Region Association: North East States |
mine came with fresh Swepco in it, changed to dino and it shifts moderately, but noticeably better
YMMV |
'73-914kid |
Mar 8 2016, 09:39 AM
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#8
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Senior Member Group: Members Posts: 1,473 Joined: 1-November 08 From: Vista, CA Member No.: 9,714 Region Association: Southern California |
My local auto parts stores stopped carrying the good GL-5 with no additives in it.. so I went looking for a good alternative.
The single best semi-attainable gear oil I've used in Kendall NS-MP 80-90. It is specifically designed for Hypoid Gears, which 914 boxes use, and it specifically states that it is for non-Limited Slip differentials. Not even recommended for Top-Offs on LSD. Most of the stuff you find that is GL-5 and Hypoid Gears has LSD additives. The Kendall has none of that. I put it in the gearbox in my dad's car, and he never crunches even the badly worn 2nd gear synchro anymore. |
bretth |
Mar 8 2016, 12:01 PM
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#9
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Senior Member Group: Members Posts: 899 Joined: 23-June 15 From: Central TX Member No.: 18,882 Region Association: Southwest Region |
Anyone know what the shelf life is of gear oil? Have a couple containers of gear oil from about 15 years ago. One was opened and half used. The other is still sealed. Wondering it they absorb water or other junk. Haven't done a manual trans in a while but now I have three that will need new oil soon. Should I scrap the oil or use them?
Brett |
914itis |
Mar 12 2016, 12:07 PM
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#10
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Advanced Member Group: Members Posts: 2,892 Joined: 9-October 10 From: New York City Member No.: 12,256 Region Association: North East States |
I use this one, when cold I crunch gears, after a few minutes of driving shifts smoothly .
(IMG:style_emoticons/default/confused24.gif) wnat is API service ? Attached thumbnail(s) |
pete000 |
Mar 12 2016, 12:51 PM
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#11
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Senior Member Group: Members Posts: 1,885 Joined: 23-August 10 From: Bradenton Florida Member No.: 12,094 Region Association: South East States |
I use Swepco, not cheap though!
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t collins |
Mar 12 2016, 01:28 PM
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#12
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Advanced Member Group: Members Posts: 3,270 Joined: 21-March 06 From: Virginia Member No.: 5,754 Region Association: None |
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Mark Henry |
Mar 12 2016, 02:59 PM
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#13
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Swepco 201 Multi-Purpose Gear Lube. Ideal for Porsche synchros. Sherwood I second the Swepco! I used Swepco for several years and I never found anything magical about it. The one thing I did like is with the blue colour it was easy to tell the difference between an engine or tranny leak. I still use almost a quart in each change just for the blue colour, that plus the fact I still have a case left over. Only gear oil that I thought was an improvement was Kendall. However I do think Swepco 101 grease is one of the best. I get a case every couple of years. |
steuspeed |
Mar 12 2016, 03:11 PM
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#14
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Senior Member Group: Members Posts: 1,008 Joined: 12-July 11 From: Portland, Oregon Member No.: 13,308 Region Association: Pacific Northwest |
Gear oil fight whoopie (IMG:style_emoticons/default/chair.gif)
914 Kid has it right. It's hard to find plain old GL5 Hypoid gear oil. I found some CarQuest brand sold by the gallon only. It's super cheap, but it works. You want NON limited slip. Stay away from synthetic and SWEPCO. Makes your trans spin way to fast for old syncros. I tried it in my car and (IMG:style_emoticons/default/barf.gif) couldn't get it out fast enough. |
Mark Henry |
Mar 12 2016, 03:16 PM
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#15
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Gear oil fight whoopie (IMG:style_emoticons/default/chair.gif) 914 Kid has it right. It's hard to find plain old GL5 Hypoid gear oil. I found some CarQuest brand sold by the gallon only. It's super cheap, but it works. You want NON limited slip. Stay away from synthetic and SWEPCO. Makes your trans spin way to fast for old syncros. I tried it in my car and (IMG:style_emoticons/default/barf.gif) couldn't get it out fast enough. I never had any problem with Swepco...other than the price. But then way back in the day I didn't have any problem with Slick 50 either..... |
Elliot Cannon |
Mar 12 2016, 03:27 PM
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#16
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914 Guru Group: Retired Members Posts: 8,487 Joined: 29-December 06 From: Paso Robles Ca. (Central coast) Member No.: 7,407 Region Association: None |
And don't forget that wonderful Swepco odor. (IMG:style_emoticons/default/barf.gif)
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steuspeed |
Mar 12 2016, 03:34 PM
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#17
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Senior Member Group: Members Posts: 1,008 Joined: 12-July 11 From: Portland, Oregon Member No.: 13,308 Region Association: Pacific Northwest |
Gear oil fight whoopie (IMG:style_emoticons/default/chair.gif) 914 Kid has it right. It's hard to find plain old GL5 Hypoid gear oil. I found some CarQuest brand sold by the gallon only. It's super cheap, but it works. You want NON limited slip. Stay away from synthetic and SWEPCO. Makes your trans spin way to fast for old syncros. I tried it in my car and (IMG:style_emoticons/default/barf.gif) couldn't get it out fast enough. I never had any problem with Swepco...other than the price. But then way back in the day I didn't have any problem with Slick 50 either..... You won't really know until you go back. Probably more than one change to get all the Swepco cleaned out. I need to do another change myself. You have multiple cars, so try the worst shifting box you have. I wanted only the best for my car and so I bought the Swepco. It's hard to believe when you spent all that money it's got to be better. For a new modern trans, yes it is. For an old 914, no. |
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