| Author | Message | ||
| Luvrbus (Luvrbus)
Registered Member Username: Luvrbus Post Number: 1319 Registered: 8-2006 Posted From: 173.87.176.221 Rating: N/A |
Is real black oil in a V730 caused by the rear engine seal leaking this stuff is black. I ask here because seems like all the GM guys with the knowledge hang here I am not the sharpest when it comes to the GM setup the engine is no problem but I never saw oil like this in a transmission btw he does run 15/40 in the transmission does the oil turn black ? good luck and thanks | ||
| joe padberg (Joemc7ab)
Registered Member Username: Joemc7ab Post Number: 585 Registered: 6-2004 Posted From: 66.38.159.33 Rating: N/A |
Cliff There is seperation between engine and transmission, Flexplate to bolt onto the transmission torque convertor, and there likely is a drain hole in the bottom of the bellhousing, so you should never see engine oil in the transmission. Even a failed oil cooler should not do that. It would have antifreeze mixing with the transmission oil. My uneducated guess is a badly burned clutch pack that is ready to pack it in. | ||
| john degemis (Degemis)
Registered Member Username: Degemis Post Number: 121 Registered: 3-2008 Posted From: 68.118.42.248  Rating: N/A |
My Prevost uses oil (C-4 motor oil) in the trans see Allisons web site http://www.allisontransmission.com/documents/product/13-TR-90,%20Rev%20E.pdf | ||
| Luvrbus (Luvrbus)
Registered Member Username: Luvrbus Post Number: 1320 Registered: 8-2006 Posted From: 173.87.176.221 Rating: N/A |
Joe,the bell housing is plugged someone even has RTV around the starter with RTV around the rear seal when I separated the 2 there was a gallon came out black like engine oil. I can not tell the difference between the engine oil and the transmission oil that was the question can the rear seal on the engine cause engine oil to enter the transmission looks to me like it could with the bell housing plugged and the transmission open with just the input shaft coming from the transmission and going to the small drive plate on the flywheel there is no torque converter between the engine and the transmission only a shaft and one heavy a** flywheel. I don't see how it could separate the 2 myself and the 4905 book does not show the V730 only the VS model here is the only numbers on the transmission 73115-3430 good luck (Message edited by luvrbus on December 03, 2011) (Message edited by luvrbus on December 03, 2011) | ||
| Luvrbus (Luvrbus)
Registered Member Username: Luvrbus Post Number: 1321 Registered: 8-2006 Posted From: 173.87.176.221 Rating: N/A |
John,C-4 oils are not approved by Allison for highway use any longer TES439 and TES468 good luck | ||
| joe padberg (Joemc7ab)
Registered Member Username: Joemc7ab Post Number: 586 Registered: 6-2004 Posted From: 66.38.159.33 Rating: N/A |
Clifford Then it looks like you may have a VS type transmission and not a 730. The 730 is part of the 700 series, similar to the 740 exept for one les gear and the output coming of the side instead of the rear. If the bellhousing is sealed, and engine oil pressure at say 40 with a leaking rear seal then I think it is possible given enoug time and oil that engine oil would end up in the transmission. | ||
| Luvrbus (Luvrbus)
Registered Member Username: Luvrbus Post Number: 1322 Registered: 8-2006 Posted From: 173.87.176.221 Rating: N/A |
Looks like this one Joe www.globaltranny.com/trannys/v730.htm if the link works lol good luck | ||
| Bill Gerrie (Bill_gerrie)
Registered Member Username: Bill_gerrie Post Number: 580 Registered: 3-2006 Posted From: 216.198.139.38  Rating: N/A |
Luvrbus It is possible to get engine oil into a transmission. If the rear seal fails it will let oil in. The seal is supposed to be a double lip type #8927749. Wear sleeve #5197159. The flywheel runs in oil so the starter is a type that has oil seals in also. Have you noticed any change in the engine oil level other then normal use. As mentioned it is posible you have a failing clutch pack as well. These clutch packs are self adjusting for wear so you won't notice it till it fails. What oil did you normally use in the transmission? If dexron you should notice some reddish colour to it even if engine oil got in. If enough engine oil got in the level would push oil out the vent on top as well as it comes out if the level is too high. The transmission churns up the oil if over filled and sends it out the vent. Bill | ||
| Tom (Oldmansax)
Registered Member Username: Oldmansax Post Number: 10 Registered: 9-2006 Posted From: 68.247.218.182  Rating: N/A |
Clifford, This is a little off the topic but there is a an Allison tranny setup for an older GM bus here locally (Maryland) that the guy wants rid of real bad. He owns the local RV dealership & had a 4104(?) with a Spicer. Bought this setup to install & then sold the bus. I can check on it if you want it. TOM | ||
| Luvrbus (Luvrbus)
Registered Member Username: Luvrbus Post Number: 1323 Registered: 8-2006 Posted From: 173.87.176.221 Rating: N/A |
The bus doesn't belong to me I am just doing a engine swap It had a low mileage 8v71T somebody used dryer duck on the intake with a make shift air cleaner (oil to paper) and destroyed the engine. Buying all the parts from Luke you GM guys have winner in Luke . I am finding out the hard way all GM buses are not equal this 4905 is a little different than a 4106 the engine cradle I was told it was the same not so lol the fan drive is not same that looks like a job to change the starter and alternator are not a big deal to change but no telling what other changes will pop up along the way good luck (Message edited by luvrbus on December 04, 2011) | ||
| Derrick Thomas (Thomasinnv)
Registered Member Username: Thomasinnv Post Number: 37 Registered: 10-2010 Posted From: 67.142.130.16  Rating: N/A |
Hey Clifford did that other fella ever show up to do the swap or are you stuck doing it by yourself? | ||
| joe padberg (Joemc7ab)
Registered Member Username: Joemc7ab Post Number: 587 Registered: 6-2004 Posted From: 66.38.159.33 Rating: N/A |
Bill You have done enough tinkering and adaptng in this area, so can you tell me which setup has the flywheel running in oil along with a sealed bellhousing? Just checked in my shed where I have a 6v92 attached to a 748 sitting on a pallet, and it has an open drain hole in the bottom of the bellhousing | ||
| Bill Gerrie (Bill_gerrie)
Registered Member Username: Bill_gerrie Post Number: 582 Registered: 3-2006 Posted From: 216.198.139.38 Rating: N/A |
Joe My knowledge is generally limited to GM's. The V730 has a wet flywheel set up because the torque convertor is internal and the internal workings are exposed to the flywheel area. I would think your set up is dry because the torque convertor is attached to the flywheel, separate from the internal workings. The V730 has a drain from the flywheel area to the oil pan on the transmission. Bill PS. The steering box has been shipped from Andy. | ||
| Luvrbus (Luvrbus)
Registered Member Username: Luvrbus Post Number: 1325 Registered: 8-2006 Posted From: 173.87.176.221 Rating: N/A |
Joe, the H70 was a wet torque converter I haven't saw a wet converter on the 600 or 700 series HT models and the H70 could be wet or dry fwiw good luck | ||
| joe padberg (Joemc7ab)
Registered Member Username: Joemc7ab Post Number: 589 Registered: 6-2004 Posted From: 66.38.159.33 Rating: N/A |
Its been a good day!! I learned a long time ago that if you learn something new each day, then you have had a good day. Never knew that the 730 is a wet flywheel setup. That is the reason why we lurk here and occasionally put our .02 canucky cents in. Joe. |