Oil leaking from crack in houseing attached to back end of gearbo
There is a crack in the houseing attached to the back end of the gearbox just below the driveshaft and it has lost all the oil from this sump? on my isuzu 175 sitec truck. I heard a noise like I had run over a plastic bottle on the road and on checking the truck found this oil leaking from the housing described above.The truck still drives OK and there are no unusual noises and all gears seem io be working ok. Can you please help with diagnosis. The fracture seems to have been caused by something inside and not from the outside, thanks
PS I couldnt find a revelant product catagory but it is a 6 ton truck 6 speed gearbox
Re: oil leaking from crack in houseing attached to back...
If you can see the crack plainly, you will need to have a transmission shop fix it for you or your isuzu dealer, good luck. but it may have just the rear seal on the transmission started leaking, and where the castings come together, looks like a crack, and just replace the seal. good luck;)
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It will be about 1/2 way up on either side of the box housing. It will be a large bolt of about 20 mm to 25 mm, once you locate it open and pop your little finger in to see if the oil is just below if not then top it up with specified oil for your vehicle.
I really doubt that the oil filter housing could be cracked by having a new filter put on. The spin on filter's sealing "O" Ring was probably pinched or left off or mis-aligned causing it to leak. With the proper "O" Ring, and seated correctly the spin on filter only has to be hand tight. If it is leaking, take it back and complain.
The oil is most likely leaking from the oil cooler seal. The oil cooler is the square aluminum piece that the oil filter screws onto. To replace the seal, remove the filter, remove both coolant hoses that attach to the cooler, remove the nut that secures the cooler to the block and slide the cooler off the tube. Replace the rubber o-ring seal which is available at the VW dealer. It's inexpensive. Replace everything in reverse order. Good luck!
hi did you get a solution for this? the same thing happened to me too.I had my oil change yesterday and today I saw the engine oil pressure lights come off and the oil started leaking very bad and the mechanic told me that the oil filter housing cracked.
sorry but its going to be a big job. you need to remove the gearbox to open up and get to the seals. you could try and use an additive in the gear box, its like oil seal for engine you can get it for engines gear boxes and difs and power steering. it sometimes goes by seek and seal, in older vehicles its quite good. you will need to replace the oil it will need to be done twice to clean it all out so it can get a good seal.. i.e change oil run engine get the gearbox to move for 20 min then change the oil as its warm not hot so let it cool down for 10-20 min then drain. put the seek and seal in and top up with oil and run as normal, check after a few days to see if its worked. usual does.
i had the same problem with mine and noticed that its not the oil,its actually the automatic gearbox fluid(red), its more than likely leaking as the injector(small metal fitting at end of tube) below the filter(big black long tube like thing that clicks over air filter) has a crack in and causes small leaks,the fluids not totally getting into the engine so it misses a gear or goes to neutral at the oddest of times(especially when you stop) new tube doesnt cost too much labour on the other hand does....
it would be almost impossible to know for sure what the exact cause but either way you will have to get a new gearbox could be a bad bearing caused allot of play and put a bind on the shaft or could have some teeth broken off a gear best bet is to check local junk yards and find a good used one and swap out.
I just had the same problem. Ford design the intake manifold with plastic water crossover which cracks. The coolant will leak onto the top of the block and and then down the back of the engine. This intake design is a known defect and was ocvered under by Ford for 7 years past the date of mfg. The crack either is in the crossover or the thermostat housing. I happed on this when I found the same leak and traced it back to the thermostat housing. I changed the thermostat, but it leaked worse. You can pickup a aftermarket for $200 and it's about 4-6 hr job to replace.