Jump to content

3500hd allison trans leak what failed to cause this leak

rich414

Recommended Posts

rich414 Enthusiast

rich414

Posted
Posted

2004 3500hd 4x4 120,000 miles

here is a photo looking UP at the bottom of the transmission. I cleaned off the bottom, place the truck on jack stands and ran it in gear for 30 seconds. the oil is leaking from the hole at the Bell housing and the silver thingie 6" to the right.

The truck shifts fine, but I am sure its just about out of oil. the under caraige of the truck has a nice coating of trans oil...

What has failed in the transmission to cause this leak?

THANKS

post-126239-0-06215300-1387079390_thumb.jpg

post-126239-0-06215300-1387079390_thumb.jpg

post-126239-0-06215300-1387079390_thumb.jpg

post-126239-0-06215300-1387079390_thumb.jpg

txab Senior Enthusiast

txab

Posted
Posted

Correct. Either the pump seal or the converter blew.

 

 

Hey Darral......Im baaack...lol

Long time since you've been around here. :lol:

txab Senior Enthusiast

txab

Posted
Posted

got a guess on a dealer fix cost? I am thinking $1200 plus parts?

 

I'd find a qualified independent trans shop, imo

gmtech4 Senior Enthusiast

gmtech4

Posted
Posted

the torque converter seal and 10 pump bolt washers IS the fix !!! ive done a few........

 

they need to have done this before ,,,do 5 pump bolt washers at a atime ,,,bolt torque has to be looked up by the tech ,i cant remember what it is ,

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • asilverblazer
      Transmission Woes :-(

      By asilverblazer · Posted

      Yep, just a quick reference point.    My main point being I’d do a thousand other things before I’d pay 10k for a transmission.    Speaking in ignorance cause I don’t look at these trucks, what is it worth? 20k?
    • asilverblazer
      Intermittent no-code issues on 2022.5+ V8 trucks — what did the shop fail to capture?

      By asilverblazer · Posted

      I think users are going to want to pick their monitored parameters, which parameters they want to see first.    It should probably start with baseline at a minimum and adjust to learned, but be able to overlay baseline for comparison.   A simple severity level would be able to determine what type of alerting is appropriate or user selectable.    Why not use the OBD port though?   I think a phone connection would be a good idea, push notifications type deal.   Number 1 issue is having data is useless if you don’t know what the data should be under normal conditions. 
    • Chuck FB
      summer road trips in the 2026 2500HD

      By Chuck FB · Posted

      I thought I would use your thread and add to it as I just did my first longer drive with my truck in the last couple of days. I drove from the Grande Prairie area of Alberta down to Edmonton and most of where I drove in the city was the ring road so fairly free flowing but a bit of stop and go as well in the city. Stayed the night and returned home and not too many stops along the way each way but every restart and certainly every cold start sets it back for fuel mileage. Why I say that is I see some people will cherry pick a fuel mileage leg after the vehicle had been warmed up driveline wise before hand and its a forgiving ( easy rolling drive leg for example ) and call that their fuel mileage which can give a false perception of reality. I was not heavily loaded at all but never the less the flip bak cover, rubber bed mat, various tools etc and extra jerry cans of fuel all way up to a few hundred pounds of dead weight so its not an empty truck. The cold inflation tire pressures are set more near the freezing point so once they are warmed up driving I was showing 45 front and over 40 rear and realize high inflation pressures would help a little in fuel mileage but certainly not the ride on our crap sections of highway. The weather was good so was not raining as that can really drag mileage down, in fact I had a bit of a tail wind on average driving home. Most people on here would never have driven on that freeway to visualize it but its got a fair bit of rolling type of landscape with numerous river valleys. For the most part I had it on cruise set to 62 although kicking it off if I caught it in time before it started down shifting and self braking going down the grades. Most of the more substantial grades its shifting into 7th I believe as 8th just doesn't have it. Total distance round trip was 643 miles and my overall average and I did refuel three times in all, figured out to 17.65 miles per US gallon. My best fuel mileage section refuel within all of this figured out to 18.46 and these are all hand calculated figures. I find if anything that the trucks computer can be over optimistic, sometimes its pretty close but other times its stretching it. On paper persay in theory the truck would have just about made it on fumes for that whole drive without refueling once.    Which made me think of the topic thread of the wonder if these trucks could do 20 mpg and that is a good question, certainly would have to be on an easy going flat highway, no head wind, the right temperature, not packing around a bunch of dead weight and puttering along even slower than I was I would suspect and going steady and not stopping to smell the flowers or take a piss !. It probably is possible but not without effort to attain that with the wind resistance and weight of these trucks. Of course on my drive most people are passing me if they have the power as per loaded highway tractors, never mind a lot of speedy vehicles but the speed limit is 68 and most are at or well over that. 
    • Aimatdeer
      Ac not keeping up

      By Aimatdeer · Posted

      Monday looks like a good day for the dealer to test an ac issue. Hopefully it all turns out good.
    • CamGTP
      Gas Prices

      By CamGTP · Posted

      Paid $2.72 for E85 today.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...