olje til g80 bakaksel tahoe

[jkk]

​Hvilke olje skal brukes til en g80 bakaksel .noen foreslår limitid slipp men er ikke g80 en mekanisk sperre ?

[Chevy-LPG]

Det stemmer, den er mekanisk. Limitid slip brukes der det er friksjonssperre. 

[sub03]

Det er litt uenighet om G80 kan kalles mekanisk sperre fordi kraften til hjulene ved hjulspinn overføres igjennom en clutchpakke.

 

Husk at disse clutchene ikke skal ha limited slip tilsetning i oljen. GM har utstedt en service bulletin hvor de påpeker at LS-tilsetning ikke skal brukes på G80-lockeren. Jeg har postet dette her på forumet et par ganger tidligere.

 

LS-tilsetning kan føre til at clutchskivene kan "sette" seg litt og dermed har du delvis eller helt stiv bakaksel hele tiden. 

Har lest at det oppleves som clutch chattering ved skarp sving på tørt underlag og ulyder fra bakdiffen.

[Bie]

G80 skal ha limited slipolje, men ikke EKSTRA tilsetning. Den bulletinen det refereres til er litt uklar. Ikke minst fordi den har amerikanske forhold i tankene Der selges omtrent ikke rene GL5 oljer uten LS-tilsetning i USA. GM's egen olje for G80 har LS tilsetning. Probmemet oppstod fordi folk kjøpte GL5-olje, som allerede har tilsetning, for deretter å tilsette egen LS-guffe. Da ble det overkill.

 

Akslingen, G80, skal ha GL5 (mineralsk eller syntetisk) MED LS tilsetning, men altså ikke ekstra tube med LS-guffe i tillegg. Alternativt kan kjøpes GL5 på Biltema UTEN TILSETNING, og så tilsette EN tube LS-guffe etter påfylling av ren GL5.

 

Dette har jeg lest meg meget grundig opp på, og selv erfart forskjell med og uten LS-tilsetning i oljen. Uten noen form for tilsetning lugger den som bare fy.

 

mvh

 

B.

[sub03]

Jeg er delvis enig i det du skriver Bie. Det er riktig at bilene fra fabrikk blir levert med en olje med pre-blandet LS-tilsetning i, og det hevdes at G80-lockeren fungerer best med slik olje.

Det jeg ikke er enig i er at G80 må ha LS-tilsetning. Både GM og Eaton skriver at de ikke trenger LS, kun ren GL5 olje.

Legg også merke til at oljen GM anbefaler mot clutch chattering (P/N 10950849) ikke inneholder LS-tilsetning.

 

https://www.amazon.com/ACDelco-10-4051-G...B007Q10F3S

 

Dette er typisk for alle diskusjoner om olje egentlig. Mange har sin mening om hva som er best og det finnes erfaringer som peker i alle retninger. Merkelig at det ikke skal gå an å få et fasitsvar på det her. Folk får vurdere selv egentlig etter infoen de vurderer som mest troverdig.

Selv brukte jeg Castrol syntetisk 75-140 GL5 olje på min Suburban uten problemer.

 

 

From EATON:

The axle is filled at the factory with a synthetic 75w90 GL5 rating made by Texaco under part # 2276. The GM service # is 12378261. This is the only lube we have done extensive testing with to insure locker compatibility. The only negative to using one of these other lubes is an increased potential for clutch chatter. This really doesn't hurt anything and can be corrected by changing the lube. Look for a GL5 rating on the bottle to make sure the ring & pinion, seals & <a class="" href="http://i.viglink.com/?key=6df15b88a2b3d6dac2e369fa96ea5a36&insertId=06e7378d8a4576923a04d49a7c05eb52&type=CD&exp=60%3ACI1C55A%3A16&libId=jg2m47sc01000b05000DAbf8q0vyl&loc=http%3A%2F%2Fwww.duramaxforum.com%2Fforum%2Fdrivetrain%2F151560-oil-locking-differential.html&v=1&out=https%3A%2F%2Fwww.amazon.com%2Fs%2Fref%3Dnb_sb_noss%3Furl%3Dsearch-alias%253Dautomotive%26field-keywords%3Dbearings&ref=http%3A%2F%2Fwww.google.no%2Furl%3Fsa%3Dt%26rct%3Dj%26q%3D%26esrc%3Ds%26source%3Dweb%26cd%3D3%26ved%3D2ahUKEwjC8ZCpvL_aAhWBFZoKHXEfCgYQFjACegQIABBI%26url%3Dhttp%253A%252F%252Fwww.duramaxforum.com%252Fforum%252Fdrivetrain%252F151560-oil-locking-differential.html%26usg%3DAOvVaw0b3Io2gYqAsDsGUtsqZ_te&title=Oil%20for%20locking%20differential%20-%20Chevy%20and%20GMC%20Duramax%20Diesel%20Forum&txt=%3Cspan%3Ebearings%3C%2Fspan%3E" title="Link added by VigLink">bearings</a> are protected. Limited slip additive is not needed."


Avoid high loads, trailer towing and high speed extended driving during the initial break in of the vehicle. After the break in period axle temps will level at a much lower figure.
<a class="" href="http://i.viglink.com/?key=6df15b88a2b3d6dac2e369fa96ea5a36&insertId=1b483e0fde5bc31c3f1c87e1e10c2c1a&type=CD&exp=60%3ACI1C55A%3A16&libId=jg2m47sc01000b05000DAbf8q0vyl&loc=http%3A%2F%2Fwww.duramaxforum.com%2Fforum%2Fdrivetrain%2F151560-oil-locking-differential.html&v=1&out=https%3A%2F%2Fwww.amazon.com%2Fs%2Fref%3Dnb_sb_noss%3Furl%3Dsearch-alias%253Dautomotive%26field-keywords%3Dgear&ref=http%3A%2F%2Fwww.google.no%2Furl%3Fsa%3Dt%26rct%3Dj%26q%3D%26esrc%3Ds%26source%3Dweb%26cd%3D3%26ved%3D2ahUKEwjC8ZCpvL_aAhWBFZoKHXEfCgYQFjACegQIABBI%26url%3Dhttp%253A%252F%252Fwww.duramaxforum.com%252Fforum%252Fdrivetrain%252F151560-oil-locking-differential.html%26usg%3DAOvVaw0b3Io2gYqAsDsGUtsqZ_te&title=Oil%20for%20locking%20differential%20-%20Chevy%20and%20GMC%20Duramax%20Diesel%20Forum&txt=%3Cspan%3EGear%3C%2Fspan%3E" title="Link added by VigLink">Gear</a> Lube changes are a good idea because the additives are replenished and contaminates such as casting sand are eliminated.



"Automatic Locking Differential Lubricants. [Note from Michael Asmussen, <a class="" href="http://i.viglink.com/?key=6df15b88a2b3d6dac2e369fa96ea5a36&insertId=98b408e0b728a4a2eb494818872d440d&type=CD&exp=60%3ACI1C55A%3A16&libId=jg2m47sc01000b05000DAbf8q0vyl&loc=http%3A%2F%2Fwww.duramaxforum.com%2Fforum%2Fdrivetrain%2F151560-oil-locking-differential.html&v=1&out=https%3A%2F%2Fwww.amazon.com%2Fs%2Fref%3Dnb_sb_noss%3Furl%3Dsearch-alias%253Dautomotive%26field-keywords%3Dtorque&ref=http%3A%2F%2Fwww.google.no%2Furl%3Fsa%3Dt%26rct%3Dj%26q%3D%26esrc%3Ds%26source%3Dweb%26cd%3D3%26ved%3D2ahUKEwjC8ZCpvL_aAhWBFZoKHXEfCgYQFjACegQIABBI%26url%3Dhttp%253A%252F%252Fwww.duramaxforum.com%252Fforum%252Fdrivetrain%252F151560-oil-locking-differential.html%26usg%3DAOvVaw0b3Io2gYqAsDsGUtsqZ_te&title=Oil%20for%20locking%20differential%20-%20Chevy%20and%20GMC%20Duramax%20Diesel%20Forum&txt=%3Cspan%3ETorque%3C%2Fspan%3E" title="Link added by VigLink">Torque</a> Control Products Division of Eaton Corp.]

We recommend the following lubrications for our locking differentials:

1)Texaco 2276; Synthetic 75W90; <a class="" href="http://i.viglink.com/?key=6df15b88a2b3d6dac2e369fa96ea5a36&insertId=cb1f075853d2f1c35bf73ece9093baa9&type=CD&exp=60%3ACI1C55A%3A16&libId=jg2m47sc01000b05000DAbf8q0vyl&loc=http%3A%2F%2Fwww.duramaxforum.com%2Fforum%2Fdrivetrain%2F151560-oil-locking-differential.html&v=1&out=https%3A%2F%2Fwww.amazon.com%2Fs%2Fref%3Dnb_sb_noss%3Furl%3Dsearch-alias%253Dautomotive%26field-keywords%3Dgm&ref=http%3A%2F%2Fwww.google.no%2Furl%3Fsa%3Dt%26rct%3Dj%26q%3D%26esrc%3Ds%26source%3Dweb%26cd%3D3%26ved%3D2ahUKEwjC8ZCpvL_aAhWBFZoKHXEfCgYQFjACegQIABBI%26url%3Dhttp%253A%252F%252Fwww.duramaxforum.com%252Fforum%252Fdrivetrain%252F151560-oil-locking-differential.html%26usg%3DAOvVaw0b3Io2gYqAsDsGUtsqZ_te&title=Oil%20for%20locking%20differential%20-%20Chevy%20and%20GMC%20Duramax%20Diesel%20Forum&txt=%3Cspan%3EGm%3C%2Fspan%3E" title="Link added by VigLink">Gm</a> Part # 9986115

2)Texaco 9622; Mineral based 80W90; GM Part # 9985290

3)Texaco 2080; Synthetic 75W140 (heavy duty applications); GM part # 9985991


Note - All of the above lubes are pre-blended with friction modifier. No additional modifiers are necessary or recommended. As far as other lubes are concerned, any standard GL 5 lube will work, but the units perform optimally with the three listed above.

 

 

 

Limer inn GM`s bulletin også, så kan folket vurdere selv:

 

 

LOCKING DIFFERENTIAL LUBRICANT (SERVICE INFORMATION) #91-4-109

SUBJECT: LOCKING DIFFERENTIAL (G80) LUBRICANT - (SERVICE INFORMATION)

VEHICLES AFFECTED: ALL LIGHT TRUCKS EQUIPPED WITH G80 REAR AXLE ALL YEARS

Some light duty trucks equipped with locking rear axles (G80) may exhibit rear axle chatter, especially when turning a corner from a stop.

This condition of alternate engagement and disengagement of clutches in differential assembly is usually caused by contaminated axle lubricant.

To correct this condition, drain and refill the rear axle with SAE 80W-90 GL5 (P/N 10950849).

The use of any additive in locking rear axles (G80) is not recommended. Rear axle additives are designed for use in limited slip differentials which are normally installed in cars. All light duty trucks equipped with RPO G80 make use of a locking differential and the use of additives will delay the engagement of the locking mechanism and may decrease axle life.


VEHICLES/COMPONENTS INVOLVED: ------------------------- ---- Some light duty trucks equipped with locking rear axles, RPO G80.

SERVICE PARTS INFORMATION:

Part Number Description ----------- ------------------ 10950849 Lubricant, Rear Axle (1 litre)

Parts are currently available through CANSPO.

WARRANTY INFORMATION:

As specified in Light Duty Truck Maintenance Schedules, locking rear axle fluid drain and refill is required owner maintenance at the first engine oil change. Failure to drain and refill the rear axle as specified may contribute to a later axle chatter condition. Refer to the appropriate Light Duty Truck Maintenance Schedule or service manual, section OB, for further details on change intervals.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.

© Copyright General Motors Corporation. All Rights Reserved.

[manfred]

Å så kom svensken.....

 

För de första: LS tillsättning gör INTE så att lamellerna sätter sig. Helt motsatt. LS tillsättning gör så att lamellerna släpper lättare.  

 

G80 är en diff typ som redan beskrivet med clutch pakke. G80 typen finns på många typer av bilar av mindre "lättare" typ camaro, firebird etc men också "tyngre" suv tahoe, suburban, pick up`s etc. (precis som de står i uthävd skift i servicebullentinen  som sub03 har lagt vid) 

Har man en frisk diff på en "lättare bil" och kör en GL5 olja UTAN LS tillsättning så kan man få "shattering" att bilen känns som den är stel "fulldiff". Men på en tyngre typ så klara man med den vikten att lamellerna släpper (bryts loss). 

Dock som vi vet som kör pickup utan last så är bakre axeltryck nästan 0 och kan då kännas/ upplevas som lättare bil typ att de blir lite stel på asfalt, men är de så illa och man bara kör runt i "8or" på torr asfalt så får man slå i LS tillsättning. För min del som oftar kör utan last väljer att ha en stel bil på asfalt och diff som fungerar när jag behöver. Alltså alltid utan LS tillsättning. 

Copy past : VEHICLES AFFECTED: ALL LIGHT TRUCKS EQUIPPED WITH G80 REAR AXLE ALL YEARS
Some light duty trucks equipped with locking rear axles (G80) may exhibit rear axle chatter, especially when turning a corner from a stop. 

 

Därför får man ta hänsyn till biltyp vikt och vad man önskar, G80 diff på en tyngre bil går inte sönder med LS tillsättnig men blir mer "behaglig" och diffar inte lika bra.

 

//M 

[sub03]

Takk for bra input Manfred. Endelig en oppklaring som makes sence.