Synthetic Transmission Oil
|
10-21-2009, 03:29
Post: #1
|
|||
|
|||
Synthetic Transmission Oil
FYI...Talking with the Dartco Allison shop this
morning. They do not recommend synthetic oil in the older transmissions. Their experience is the older gaskets do not like the synthetic and the gaskets start leaking the stuff. Curt Sprenger 1987 PT38 8V92 "MacAttack Racing" Anaheim Hills, CA |
|||
10-21-2009, 03:45
Post: #2
|
|||
|
|||
Synthetic Transmission Oil
Hey Curt,
What do you think constitutes "old"? I recently bought a 92 Wanderlodge and it already has synthetic in it... Thanks, Ray --- In WanderlodgeForum@yahoogroups.com, Curt Sprenger > > FYI...Talking with the Dartco Allison shop this morning. They do not > recommend synthetic oil in the older transmissions. Their experience is the > older gaskets do not like the synthetic and the gaskets start leaking the > stuff. > > > Curt Sprenger > 1987 PT38 8V92 "MacAttack Racing" > Anaheim Hills, CA > |
|||
10-21-2009, 04:14
Post: #3
|
|||
|
|||
Synthetic Transmission Oil
Ray,
What constitutes "old"? WE'd need to search out changes in gasket material that stand up the the synthetic, and what year Allison started using the gaskets in both new and trans. builds. I'll try to remember to ask the Allison dealer that question. A rebuilt trans., depending on the rebuild year could have the new compliant material.ÃÂ I know for sure the local Allison shop does not recommend the synthetic for our '87 HTB748. Curt Sprenger 1987 PT38 8V92 "MacAttack Racing" Anaheim Hills, CA On Wed, Oct 21, 2009 at 8:45 AM, Ray <"selahthunder@yahoo.com"> wrote:
|
|||
10-21-2009, 05:51
Post: #4
|
|||
|
|||
Synthetic Transmission Oil
Curt,
They ought to put a new pan gasket on when they service the tranny. My 83 PT40 had Amsoil synthetic in the tranny (as well as the engine, differential and genset) for most of the 9 years I owned it after I changed it over in year 1. The only leak I had was the slobber tubes. Sounds like more anti-synthetic folklore to me. Mike Bulriss 1991 WB40 "Texas Minivan" San Antonio, TX --- In WanderlodgeForum@yahoogroups.com, Curt Sprenger > > FYI...Talking with the Dartco Allison shop this morning. They do not > recommend synthetic oil in the older transmissions. Their experience is the > older gaskets do not like the synthetic and the gaskets start leaking the > stuff. > > > Curt Sprenger > 1987 PT38 8V92 "MacAttack Racing" > Anaheim Hills, CA > |
|||
10-21-2009, 06:13
Post: #5
|
|||
|
|||
Synthetic Transmission Oil
Mike,
I'm not pulling this info. out of a hat...it comes from a well established Allison dealer. Their experience with transmission issues is far greater than the forum. Curt Sprenger 1987 PT38 8V92 "MacAttack Racing" Anaheim Hills, CA On Wed, Oct 21, 2009 at 10:51 AM, mbulriss <"mbulriss@yahoo.com"> wrote:
|
|||
10-21-2009, 09:47
Post: #6
|
|||
|
|||
Synthetic Transmission Oil
OK then,... how about this piece of mis-information, in the form of a Service
Advisory *direct* from Allison Corporation as far back as 2001: http://www.allisontransmission.com/docum...ev%20E.pdf I assume your HTB748 is part of the HT 700 family of transmissions, just as MT654CR was part of their MT 600 family of trannys. I note from the Allison chart that the first recommendation from Allison is for the synthetic fluid, and yes I will assume Allison has more experience than the forum. SI will also note that my local Allison house told me to "get that ATF cr*p out of there and put C-4 in - that's what we use". Some people live in the past and 'do it the way we have always done it'. I chose to go with the manufacturer's recommendation. Sorry for trying to help. Mike Bulriss 1991 WB40 "Texas Minivan" San Antonio, TX --- In WanderlodgeForum@yahoogroups.com, Curt Sprenger > > Mike, > > I'm not pulling this info. out of a hat...it comes from a well established > Allison dealer. Their experience with transmission issues is far greater > than the forum. > > > Curt Sprenger > 1987 PT38 8V92 "MacAttack Racing" > Anaheim Hills, CA > > > > On Wed, Oct 21, 2009 at 10:51 AM, mbulriss <mbulriss@...> wrote: > > > > > > > Curt, > > > > They ought to put a new pan gasket on when they service the tranny. My 83 > > PT40 had Amsoil synthetic in the tranny (as well as the engine, differential > > and genset) for most of the 9 years I owned it after I changed it over in > > year 1. The only leak I had was the slobber tubes. > > > > Sounds like more anti-synthetic folklore to me. > > > > Mike Bulriss > > 1991 WB40 "Texas Minivan" > > San Antonio, TX > > > > > > --- In WanderlodgeForum@yahoogroups.com > > Curt Sprenger > > > > > > FYI...Talking with the Dartco Allison shop this morning. They do not > > > recommend synthetic oil in the older transmissions. Their experience is > > the > > > older gaskets do not like the synthetic and the gaskets start leaking the > > > stuff. > > > > > > > > > Curt Sprenger > > > 1987 PT38 8V92 "MacAttack Racing" > > > Anaheim Hills, CA > > > > > > > > > > |
|||
10-21-2009, 11:20
Post: #7
|
|||
|
|||
Synthetic Transmission Oil
Mike, Curt and others- All that I can contribute here is my own experience with
Transynd. The tranny pan and housing was dry as a bone until I switched over to Transynd in July, 2008. It started to drip and spray the towed within about 8K miles of the switch and became progressively worse. Seepage was actually coming from the retarder and two other gaskets including the one between the retarder and tranny housing. What occurred is the result of a very good quality fluid (high film strength and low pour-point) combined with old, dry gaskets. It could have been coincidence, but my "consultant" at Penn DD/Allison also made the statement that the older tranny gaskets seem to weep when you change over to Transynd. I have an MTB654CR in the coach. I'm going to stick with the Transynd now that the old stuff is all flushed out- but if I had it to do over again, I'd never make that switch. The new stuff does not run any cooler and made absolutely no difference in shift quality- despite what is promoted by the dealers. Shane Fedeli 85PT40 Hershey, PA --- In WanderlodgeForum@yahoogroups.com, "mbulriss" <mbulriss@...> wrote: > > OK then,... how about this piece of mis-information, in the form of a Service Advisory *direct* from Allison Corporation as far back as 2001: > http://www.allisontransmission.com/docum...ev%20E.pdf > > I assume your HTB748 is part of the HT 700 family of transmissions, just as MT654CR was part of their MT 600 family of trannys. I note from the Allison chart that the first recommendation from Allison is for the synthetic fluid, and yes I will assume Allison has more experience than the forum. > > SI will also note that my local Allison house told me to "get that ATF cr*p out of there and put C-4 in - that's what we use". Some people live in the past and 'do it the way we have always done it'. I chose to go with the manufacturer's recommendation. > > Sorry for trying to help. > > Mike Bulriss > 1991 WB40 "Texas Minivan" > San Antonio, TX > > --- In WanderlodgeForum@yahoogroups.com, Curt Sprenger > > > > Mike, > > > > I'm not pulling this info. out of a hat...it comes from a well established > > Allison dealer. Their experience with transmission issues is far greater > > than the forum. > > > > > > Curt Sprenger > > 1987 PT38 8V92 "MacAttack Racing" > > Anaheim Hills, CA > > > > > > > > On Wed, Oct 21, 2009 at 10:51 AM, mbulriss <mbulriss@> wrote: > > > > > > > > > > > Curt, > > > > > > They ought to put a new pan gasket on when they service the tranny. My 83 > > > PT40 had Amsoil synthetic in the tranny (as well as the engine, differential > > > and genset) for most of the 9 years I owned it after I changed it over in > > > year 1. The only leak I had was the slobber tubes. > > > > > > Sounds like more anti-synthetic folklore to me. > > > > > > Mike Bulriss > > > 1991 WB40 "Texas Minivan" > > > San Antonio, TX > > > > > > > > > --- In WanderlodgeForum@yahoogroups.com > > > Curt Sprenger > > > > > > > > FYI...Talking with the Dartco Allison shop this morning. They do not > > > > recommend synthetic oil in the older transmissions. Their experience is > > > the > > > > older gaskets do not like the synthetic and the gaskets start leaking the > > > > stuff. > > > > > > > > > > > > Curt Sprenger > > > > 1987 PT38 8V92 "MacAttack Racing" > > > > Anaheim Hills, CA > > > > > > > > > > > > > > > > |
|||
« Next Oldest | Next Newest »
|
User(s) browsing this thread: 1 Guest(s)