Forfatter Emne: Gearolie til 4 trins på en luftkølet (CU)?  (Læst 2803 gange)

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Offline watsondenmark

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Gearolie til 4 trins på en luftkølet (CU)?
« Dato: 07. Februar 2017 kl: 23:24:23 »
Jeg har siddet og surfet internettet igennem, efter artikler om gearolie til en gammel 4-trins som min. Jeg kan ikke umiddelbart finde noget brugbart.

Har I nogen erfaringer?

Jeg har tildligere kørt med Swepco 201 (80w/90 mineralsk) i en gammel luftkølet Porsche, med et fremragende resultat, men vil det mon være rigtigt at fylde på en T3?
Porsche 911 (993) Carrera Tiptronic 1994 (hverdag)
VW Transporter T3 Doka 1981 (under renovering)

Offline Hinze

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Sv: Gearolie til 4 trins på en luftkølet (CU)?
« Svar #1 Dato: 08. Februar 2017 kl: 06:05:12 »
er den SAE80 GL4 og ikke 5

Offline watsondenmark

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Sv: Gearolie til 4 trins på en luftkølet (CU)?
« Svar #2 Dato: 09. Februar 2017 kl: 23:14:41 »
Det er GL-5
Er det forkert?

Har aldrig fundet ud af, hvad GL-4 og 5 osv. betyder
Porsche 911 (993) Carrera Tiptronic 1994 (hverdag)
VW Transporter T3 Doka 1981 (under renovering)

Offline POLLE955

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Sv: Gearolie til 4 trins på en luftkølet (CU)?
« Svar #3 Dato: 09. Februar 2017 kl: 23:22:24 »
Hej prøv at kig i Jeppe bjerum s indlæg det har været op før mener jeg .
Hilsen Poul
Speed Kills - Drive A Bus And Live Forever!
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Offline Hinze

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Sv: Gearolie til 4 trins på en luftkølet (CU)?
« Svar #4 Dato: 10. Februar 2017 kl: 06:10:31 »
ja, der er tilsyneladende mange forskellige holdninger til emnet. Her er sakset en fra en samba-tråd.

Here's an explanation Bruce sent me almost 2 years ago when I had the same question. Figured I'd help you not to repeat yourself again, great info!

Jeff, All cars made today have brass syncros that look the same as Beetle syncros. To think that the oil companies would make a product that would destroy every gearbox it went into is rediculous. When I first heard this GL-4/GL-5 corrosion thing, I did some research on the oil co web sites. I couldn't find anywhere that said it was harmful, so I sent a tech message to the Amsoil tech guy. His response stated the history of how that myth got started by the ignorant VW people. When GL-5 first came out it was indeed corrosive to brass syncros. But only at temps above 250ºF. Now since it is impossible to get any street driven gear oil to that temp (It is hard to get engine oil that hot!), there will be no problems using regular GL-5. However, just to satisfy the ignorant masses, the API came up with another added rating, called MT-1 which is tacked onto the end of all GL-5 oils you can buy today. With this MT-1, GL-5 oil is not corrosive at any temp.
The difference between GL-4 and GL-5 is the extreme pressure capability. On surfaces that have high pressure where metal to metal contact will happen, the GL-5 is way better at protecting. Spider gear teeth and side gear teeth are one place where GL-5's better EP rating is desperatly needed. I've got 5-6 Bus 091 ZFs in my garage right now that have suffered significant wear on the gear teeth from probably using GL-4.
The nay-sayers like to point out their Bentley recommends GL-4. Of course it does, that's all there was 30 years ago. It also recommends using only mono-grade engine oil, bias ply tires........
The use of synthetic or dino makes no difference. I highly recommend you use syn over dino, you can really feel the difference in the way it shifts. If you buy a fresh gearbox, first put in dino for about 500-1000 miles then dump it and put in syn. It stays there long enough to warrant the extra cost, unlike syn engine oil.
I put my money where my mouth is. My last gearbox was a full out Berg 5 with close 2nd and a near NOS ZF. You couldn't pay me enough to risk damaging it with GL-4's inferior EP performance. Argueably, that gearbox is worth $3500-4k.
I always challenge the guys that say GL-5 is bad by asking them to tell me who do they know that had a failure using GL-5. Still waiting.
Good luck,
Bruce

http://www.thesamba.com/vw/forum/viewtopic.php?t=276529


her en anden holdning fra samme tråd

Everytime this topic comes up I am reminded of an interesting tag that comes with all transmissions from -
German Transaxle of America, formerly Volkstrans
61560 American Lane
Bend, OR 97702

"CAUTION! This trans must be filled with only 80 or 90 weight GL-4 Rated
oil, NOT GL-5, NOT GL-6, NOT GL-3-4-5, NOT GL 4-5-6! Use of any oil
other than straight GL-4 voids the warranty on the synchronizers! GL-4
oil is available from Pennzoil, Valvoline, Castrol, and many other
manufacturers. Do not be talked out of GL-4 by your local supplier who
may not have it! VW and Audi synchros were designed for GL-4 oil, and
any use of GL-5 will cause hard shifting and possibly damage to the
unit. Really! Trust us on this one.

We also highly recommend Redline MT-90 synthetic for easier shifting.
This is the only oil other than the correct GL-4 that will not void the
warranty on the trans."


forvirret, tja
« Senest Redigeret: 10. Februar 2017 kl: 06:15:46 af Hinze »

Offline watsondenmark

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Sv: Gearolie til 4 trins på en luftkølet (CU)?
« Svar #5 Dato: 15. Februar 2017 kl: 16:23:17 »
Tak for svar. Jeg må nok hellere købe GL-4 så :)
Porsche 911 (993) Carrera Tiptronic 1994 (hverdag)
VW Transporter T3 Doka 1981 (under renovering)