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904 trany revingup before going into 3rd gear #1644594 07/09/14 08:36 PM 07/09/14 08:36 PM
Joined: Jul 2008 Posts: 271 Indiana D dragracer1 OP enthusiast
dragracer1 OP enthusiast D Joined: Jul 2008 Posts: 271 Indiana	Hey Moparts transmission guru's, I am having an issue with my drag car going into 3rd gear. I have a 904 with a trans brake with a manual reverse valve body. As I am under full power headed down track, the 1-2 shift is nice and hard but the 2-3 shift is not that good. Once I make the shift with the shifter, the motor revs about 200-300 higher before it shifts. It almost sound like I am power shifting a manual trany. I just had my converter rebuilt and the power is quite a bit better than before, about a 10th better in the 1/8th. It did not seem to do this shifting issue until I had the converter rebuilt. Is this "slip" or "overrev" due to the converter or has the converter being rebuilt changed how the trany acts? Could it need a band adjustment? Btw, even with this shifting issue the car is DEADLY consistant. 7.01 to 7.03 for 15 runs in a row over 2 days. Any help or advise would be GREATLY appreciated! Thanks BP

Re: 904 trany revingup before going into 3rd gear [Re: dragracer1] #1644595 07/09/14 10:53 PM 07/09/14 10:53 PM
Joined: Jul 2007 Posts: 271 MO, USA Tom Hand enthusiast
Tom Hand enthusiast Joined: Jul 2007 Posts: 271 MO, USA	DragRacer, Go back and reset you kickdown band like it was when you first started running it. Sounds like it is getting loose unless you are losing the ring seal to drum or the internal lip seal of the direct drum. Tom

Re: 904 trany revingup before going into 3rd gear [Re: Tom Hand] #1644596 07/09/14 10:57 PM 07/09/14 10:57 PM
Joined: Aug 2003 Posts: 43,161 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,161 Bend,OR USA	Quote: DragRacer, Go back and reset you kickdown band like it was when you first started running it. Sounds like it is getting loose unless you are losing the ring seal to drum or the internal lip seal of the direct drum. Tom Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: 904 trany revingup before going into 3rd gear [Re: Cab_Burge] #1644597 07/10/14 12:19 AM 07/10/14 12:19 AM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	adjust the front band and then adjust the TPV linkage. band may need adjusted to hold the HP increase.

Re: 904 trany revingup before going into 3rd gear [Re: Tom Hand] #1644598 07/10/14 11:58 AM 07/10/14 11:58 AM
Joined: Jul 2008 Posts: 271 Indiana D dragracer1 OP enthusiast
dragracer1 OP enthusiast D Joined: Jul 2008 Posts: 271 Indiana	Thanks for the info guys! I had someone else build my trany last year, do you any of you know how many turns to back the band adjuster off to get me close to a good starting point once i tighten it back up? Thanks Brad

Re: 904 trany revingup before going into 3rd gear [Re: dragracer1] #1644599 07/10/14 08:37 PM 07/10/14 08:37 PM
Joined: Sep 2004 Posts: 523 Right here HP2 mopar
HP2 mopar Joined: Sep 2004 Posts: 523 Right here	Quote: Thanks for the info guys! I had someone else build my trany last year, do you any of you know how many turns to back the band adjuster off to get me close to a good starting point once i tighten it back up? Thanks Brad 1.5 turns back is usually fine 70 W100 Power Wagon. 318 4-spd 70 Sport Fury 440 2dr HT 71 Duster 340 71 Charger Super Bee - 383/727 72 Charger "Sabotage" - 440/727 - Street/Strip 78 Warlock in beautiful patina

Re: 904 trany revingup before going into 3rd gear [Re: HP2] #1644600 07/11/14 01:30 PM 07/11/14 01:30 PM
Joined: Jul 2008 Posts: 271 Indiana D dragracer1 OP enthusiast
dragracer1 OP enthusiast D Joined: Jul 2008 Posts: 271 Indiana	Quote: Quote: Thanks for the info guys! I had someone else build my trany last year, do you any of you know how many turns to back the band adjuster off to get me close to a good starting point once i tighten it back up? Thanks Brad 1.5 turns back is usually fine Great!...I just have one more question and this may be the dumbest of all, but if Im not mistaken, isn't there two bands that can be adjusted, and if so, where is the location on the case for the band I need to adjust? thanks Brad

Re: 904 trany revingup before going into 3rd gear [Re: dragracer1] #1644601 07/11/14 03:30 PM 07/11/14 03:30 PM
Joined: Jan 2003 Posts: 25,786 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,786 Rio Linda, CA	Here's a pic of the adjuster location...if the lever ratio is unknown I'd set it at 2 turns out. 8205045-KDBandAdj(Small).jpg (61 downloads)

Re: 904 trany revingup before going into 3rd gear [Re: John_Kunkel] #1644602 07/11/14 08:14 PM 07/11/14 08:14 PM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	yes, there are 2 bands to adjust. the low/revs needs the pan dropped to make that adjustment. the kickdown band can be done without dropping the pan and is in the pic John posted above.

Re: 904 trany revingup before going into 3rd gear [Re: dragracer1] #1644603 07/11/14 10:59 PM 07/11/14 10:59 PM
Joined: Aug 2003 Posts: 43,161 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,161 Bend,OR USA	The factory service manuals on the 727 II've never raced a 904 )calls for tightening the front band to 72 inch lbs and then back out the adjuster screw from 1.5 to 2.0 full turns and then lock the locknut down , depending on which motor and year on how far out try adjsuting the front band and if it still revs between shifts your probally going to need some front clutches Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: 904 trany revingup before going into 3rd gear [Re: Cab_Burge] #1644604 07/14/14 11:26 PM 07/14/14 11:26 PM
Joined: Jul 2008 Posts: 271 Indiana D dragracer1 OP enthusiast
dragracer1 OP enthusiast D Joined: Jul 2008 Posts: 271 Indiana	Thank you all! This should hopefully fix my issue. Again,thanks for all the info. Moparts has the best members around!

Re: 904 trany revingup before going into 3rd gear [Re: Cab_Burge] #1644605 07/22/14 12:10 PM 07/22/14 12:10 PM
Joined: Jul 2008 Posts: 271 Indiana D dragracer1 OP enthusiast
dragracer1 OP enthusiast D Joined: Jul 2008 Posts: 271 Indiana	Just an update on this revving issue. I checked the band adjustment and it was WAY past 2 turns. I readjusted it to 2 turns out so hopefully this was the issue. I really hope this cures it, because I have 3 5 granders to go to next weekend. If not, my tranny guy has some explaining to do because he had the tranny apart in November and said the clutches looked new. I will find out on Saturday. Thanks again moparts friends!

Re: 904 trany revingup before going into 3rd gear [Re: dragracer1] #1644606 07/22/14 02:08 PM 07/22/14 02:08 PM
Joined: Jan 2003 Posts: 75,005 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,005 U.S.S.A.	Quote: Just an update on this revving issue. I checked the band adjustment and it was WAY past 2 turns. I readjusted it to 2 turns out so hopefully this was the issue. I really hope this cures it, because I have 3 5 granders to go to next weekend. If not, my tranny guy has some explaining to do because he had the tranny apart in November and said the clutches looked new. I will find out on Saturday. Thanks again moparts friends! Ask him about the band strut , if it's not an aftermarket of or modified stocker it could be bending .

Re: 904 trany revingup before going into 3rd gear [Re: JohnRR] #1644607 07/22/14 03:36 PM 07/22/14 03:36 PM
Joined: Jul 2008 Posts: 271 Indiana D dragracer1 OP enthusiast
dragracer1 OP enthusiast D Joined: Jul 2008 Posts: 271 Indiana	Quote: Quote: Just an update on this revving issue. I checked the band adjustment and it was WAY past 2 turns. I readjusted it to 2 turns out so hopefully this was the issue. I really hope this cures it, because I have 3 5 granders to go to next weekend. If not, my tranny guy has some explaining to do because he had the tranny apart in November and said the clutches looked new. I will find out on Saturday. Thanks again moparts friends! Ask him about the band strut , if it's not an aftermarket of or modified stocker it could be bending . The tranny is a TCI built for a a friend's super stocker so Im guessing its an aftermarket band. I only ran it for 1 year before he rebuilt it. And I think all he did was put new clutches in it during the freshening up. If this doesn't work then I will ask him about it. He is one of those guys that is really hard to get hold of. Thanks BP

Re: 904 trany revingup before going into 3rd gear [Re: dragracer1] #1644608 07/22/14 04:26 PM 07/22/14 04:26 PM
Joined: Jan 2003 Posts: 75,005 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,005 U.S.S.A.	Quote: Quote: Quote: Just an update on this revving issue. I checked the band adjustment and it was WAY past 2 turns. I readjusted it to 2 turns out so hopefully this was the issue. I really hope this cures it, because I have 3 5 granders to go to next weekend. If not, my tranny guy has some explaining to do because he had the tranny apart in November and said the clutches looked new. I will find out on Saturday. Thanks again moparts friends! Ask him about the band strut , if it's not an aftermarket of or modified stocker it could be bending . The tranny is a TCI built for a a friend's super stocker so Im guessing its an aftermarket band. I only ran it for 1 year before he rebuilt it. And I think all he did was put new clutches in it during the freshening up. If this doesn't work then I will ask him about it. He is one of those guys that is really hard to get hold of. Thanks BP I wouldn't assume that with a TCI build from posts I have seen from the past about their transmissions.

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