Topic: 93 R150F pulls foward in netural.

[Phazertwo]

So, when I got the truck it did this just a little. I figured it was because of the thick gear oil.  But now that I have 200:1 its a problem. the parking break can't hold it back in 200:1 and it seems to be getting worse.  Bearing going bad maybe? Anyone else have this problem? Searched but didn't come up with much...
thanks for any help!
PZ

[HDcruiser]

My 85 runner does the same thing too. I added a MC crawl box and new MC  heavy duty clutch and when i go to start it in nuetral it will also roll forward if i dont have the e brake on. I never had this problem untill i added the crawl box and clutch. Mine doesnt seem to be as bad as yours, but its anoying.

[83MT]

Mine does this a little, but only when the clutch pedal is out, and mostly only when it's cold out. I don't think it started before I had some master cylinder issues, though...

We had some -20 degree temps last winter, and suddenly my clutch was slipping, and before I knew it, I could sit in one place idling with the truck in gear, clutch out, no movement. It would stall if I put the clutch in. Couldn't shift with the clutch in. I finally limped it home by pushing the clutch in as far as I could...with it pushed in, the truck would creep forward. Master cylinder fixed this, for reasons I still can't figure out, but maybe I was getting air in the fluid or something and creating some kind of vacuum...I just really don't know.

Ever since then, when it's cold out, I start the truck, let out the clutch (in neutral), and the truck starts creeping forward a bit.

Not sure if this has anything to do with your issue, but I could it could trigger some "eureka!" moment for someone...

[79coyotefrg]

dude, a few years back i went to Minnesota in my truck at 15 below  i started my truck and the cold gear oil made my truck climb over a bump stop in the parking lot

i put the rear tcase in neutral and the tranny in 1st and it warmed up nicely without trying to move

i use 80/90 gear oil

[Phazertwo [OP]]

It is MUCH worse when its cold.  I guess there really isn't anything wrong with it than.  Just to much for the breaks to handle in 200:1 

[HDcruiser]

Thats the gear oil im using, 80-90..  Oh well i guess i no harm no foul...

[TacoRunner]

It could also be that you need to adjust your clutch too. I put a new clutch in and the adjustment made it grab while in neutral.

[Phazertwo [OP]]

It could also be that you need to adjust your clutch too. I put a new clutch in and the adjustment made it grab while in neutral.

When the tranny is in neutral, and the clutch all the way out, the clutch adjustment is not a factor, since its fully engaged.
PZ

[NATER623]

you could try using a light weight synthetic oil such as Redline MTL  or Royal Purple Synchromesh,  It would tend to stay thinner when cold causing less drag.  I hat a trans that wouldnt shift when cold(about 30 degrees) and some synthetic 80/90 solved that.