Red Line mt 90 is gl 4 , Sta lube that eric mentioned has a gl 4 rating , most of the 90 whts. will have several ratings , I found Sta Lube at O'rielys they also have a synthetic in Sta Lube , From the type 2 archives Sta Lube seems to be a widely used oil in the vintage bus crowed, theres lots of good oils out there now so the brand is kinda of a personal choice .The red Line oil came from Jeg's.Hope this helps --- Christopher Dirksen <cajun-eskimo@xxxxxxxxxxx> wrote: --------------------------------- The book say's hypoid gear oil I have been trying to search for the 90 weight with a GL -4 rateing and found TITAN Gear LS 90, 140 LS (Limited Slip) hypoid gear oil for highly stressed normal and limited slip differentials in cars, vans, trucks, buses, tractors, construction and industrial machinery. Protects all metals normally found in gearboxes against corrosion and does not leave deposits on oil seals. But it is API GL-5/ GL-5 LS but the TITAN Gear Syn 50 A fully synthetic manual transmission lubricant for extended drain and severe service applications in heavy duty manual transmissions in trucks and other commercial vehicles. Recommended for use in Eaton, Roadranger and Rockwell transmissions operating under arduous conditions such as high ambient temperatures and heavy loads, or where long oil drain periods are required. Suitable for use in Allison transmissions for on-road and off-highway applications where a C4 specification is required. Can be used where an SAE 50 or SAE 40 engine oil, or an SAE90 gear oil to API GL-4 is specified. Specifications: Eaton Caterpillar TO-4 SAE 50 Komatsu Dresser Rockwell ZF TE-ML 01/03 Komatsu Allison C-4 API GL-4 Interesting, Paul did they say what brand they use? Thanks Cajun Eskimo Christopher Dirksen --------------------------------- From: singlecabboy <sealingwaxred@xxxxxxxxxxxxx> Reply-To: tcb@xxxxxxxxxxxxx To: tcb <tcb@xxxxxxxxxxxxx> Subject: [tcb] Oil leak and trans oil Date: Mon, 8 Jan 2007 11:37:13 -0800 (PST) >From the type 2 archives, most folks and tranbuilders >suggest you use a 90 weight with a GL -4 rateing , one >trans builder even says if you use another rating it >will void the warrinty on his trans, supposedly any >other than GL-4 can harm the brass on the sycronizers. > >Paul Smith >www.23window.com/thezone > >T.C.B. >H.B.B. > --------------------------------- From photos to predictions, The MSN Entertainment Guide to Golden Globes Paul Smith www.23window.com/thezone T.C.B. H.B.B.