 Transmission Inspection, What should I look for and relpace |
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| xperu |
 Nov 1 2007, 01:30 PM
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#1
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TEXAS  Group: Members Posts: 597 Joined: 13-June 06 From: League City Texas Member No.: 6,213 Region Association: None 
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I have the transmission out of my 73 while the engine is being rebuilt. Can you guys give me some advice on what I should inspect for and replace. The transmission was working fine when removed about 2 months ago with no leaks, grinding, noise etc. I not sure of it's previous history. Thanks Mike
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Replies(1 - 4)
| dr914@autoatlanta.com |
Nov 1 2007, 02:22 PM
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#2
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914 Guru Group: Members Posts: 8,161 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
QUOTE(xperu @ Nov 1 2007, 12:30 PM)  I have the transmission out of my 73 while the engine is being rebuilt. Can you guys give me some advice on what I should inspect for and replace. The transmission was working fine when removed about 2 months ago with no leaks, grinding, noise etc. I not sure of it's previous history. Thanks Mike I actually would not take it apart! Just change the oil with 80/90 weight, and clean it up. If the trans happens to grind into a gear in the future it is easily removed with the engine in the car |
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| Cap'n Krusty |
Nov 1 2007, 02:40 PM
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#3
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
Reasonable advice, to a point. As gear oil doesn't wear out, there's only one reason to drain it, and that's to see what's on the drain plug magnet. If it's quiet and shifts well, why bother? If you do decide to look, then you must remember that trannies with Porsche style synchros use ONLY STRAIGHT GL5. No GL4, No one-size-fits-all oil, no mixtures, and NO ADDITIVES, ESPECIALLY anything touted to contain "moly', or anything that claims to make it "slicker". The Cap'n
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| Greenguy |
Nov 6 2007, 12:58 AM
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#4
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Member Group: Members Posts: 51 Joined: 29-December 06 From: Clovis, CA Member No.: 7,402 |
QUOTE(Cap'n Krusty @ Nov 1 2007, 01:40 PM) Reasonable advice, to a point. As gear oil doesn't wear out, there's only one reason to drain it, and that's to see what's on the drain plug magnet. If it's quiet and shifts well, why bother? If you do decide to look, then you must remember that trannies with Porsche style synchros use ONLY STRAIGHT GL5. No GL4, No one-size-fits-all oil, no mixtures, and NO ADDITIVES, ESPECIALLY anything touted to contain "moly', or anything that claims to make it "slicker". The Cap'n What is wrong with moly? |
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| Dr Evil |
Nov 6 2007, 03:18 PM
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#5
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Send me your transmission! Group: Members Posts: 23,038 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region
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Moly additives are inappropriate for the type of mechanisms used in the 901 tranny.
I disagree on the changing of the gear oil as there is a vent on the top of the tranny that is not a one way port. It is often that those who have old oil will have lots of dirt in their oil. Plus, it is a great way to begin to diagnose how the internals are doing; If a lot of gold tint in your oil = fork ware, lost bearing cage, lots of metal shavings (there are usually a lot regardless, but..) can mean gear ware, etc. If it isnt broke, dont fix it. If you must do something, change 1st gear synchro band. I have pics in my tranny thread (link in the bottom here) that may give you some direction. If you end up taking the stack out, take pics (I can direct you) and we can all get a good look at how the guts are. |
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