Help! Leaking transmission

[YJBLUE]

Hey all:

I have an 88 YJ with the 4.2L and the Peugeot 5 speed manual trans. I have always had a slight oil leak in the trans but it seems to have gotten worse after I changed the oil recently. The drain and fill plugs are tight (no leak there). Can anyone recommend an additive that will help stop the leak? Much appreciated. Thanks...

 

[90Xjay]

Additives can't always fix leaks if they are bad enough.

I would wash it off at a carwash and drive it awhile and see where the leak is coming from.

 

[YJBLUE]

It seems to be leaking from either the front seal or the gasket between the two halves of the BA 10/5 transmission I have. It shifts fine so I don't want to go crazy taking things apart if I can halt the leak (or slow it down) with a good leak-stop additive. Anybody use one of these before? Thanks............

 

[lah2420]

Is it transmission fluid for sure? An engine oil leak will blow back on the transmission and make it look like the leak is there.

 

[Bounty__Hunter]

Sounds like a rear main seal on the engine.

There are no stopleak additives for manual trannies that I know of, best of replacing whatever seal or gasket is bad.

 

[YJBLUE]

Good points, but unfortunatly it is coming from the transmission. The oil I'm finding below the manual transmission is new, clean oil. When I changed the fluid in my trans I used 10w/40 motor oil because thats what's recommended for a Peugeot BA 10/5 trans. What came out might have been a heavier oil (90w)? so maybe thats why I didn't notice much of a leak before. Still, I positive that 10w/40 belongs in there. I took ma look at a trans sealer made by Lucas today but it was so thick I don't know how I would ever get it into my trans. Suggestions???

 

[90Xjay]

Good points, but unfortunatly it is coming from the transmission. The oil I'm finding below the manual transmission is new, clean oil. When I changed the fluid in my trans I used 10w/40 motor oil because thats what's recommended for a Peugeot BA 10/5 trans. What came out might have been a heavier oil (90w)? so maybe thats why I didn't notice much of a leak before. Still, I positive that 10w/40 belongs in there. I took ma look at a trans sealer made by Lucas today but it was so thick I don't know how I would ever get it into my trans. Suggestions???

Option 1: put up with the leak.
Option 2: pull the transmission and repair the leak.

I hate to sound blunt, but there is no miracle here.

If its leaking that bad and you don't want to put up with it, yank it out and re-seal whats leaking.

 

[Darold]

The service manual calls for SAE 75w-90 API-GL5 quality for the Peugeot.

 

[Sparky-Watts]

Good points, but unfortunatly it is coming from the transmission. The oil I'm finding below the manual transmission is new, clean oil. When I changed the fluid in my trans I used 10w/40 motor oil because thats what's recommended for a Peugeot BA 10/5 trans. What came out might have been a heavier oil (90w)? so maybe thats why I didn't notice much of a leak before. Still, I positive that 10w/40 belongs in there. I took ma look at a trans sealer made by Lucas today but it was so thick I don't know how I would ever get it into my trans. Suggestions???

I'm not very familiar with the Peugeot transmission, but 10w/40 sounds awfully light for transmission oil. Most likely the reason the leak seemed to get worse after you changed fluid is that the low viscosity of the 10w/40 allows it to seep past the seals much easier and therefore in more noticeable quantities than say a 75w or 90w oil would. Are you certain about the 10w/40 being the right oil?

EDIT: Didn't see Darold's post above before I posted this.

 

[jfrabat]

I agree with Spary; 10W-40 sounds really light... I would verify that.

 

[Bounty__Hunter]

I took ma look at a trans sealer made by Lucas today but it was so thick I don't know how I would ever get it into my trans. Suggestions???

Pull the shifter boots and shifter off and dump it in the transmission.