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TRANSBRAKE NOT HOLDING #1295400 09/01/12 09:15 PM 09/01/12 09:15 PM
Joined: Jan 2011 Posts: 58 Illinois B bad543dart OP member
bad543dart OP member B Joined: Jan 2011 Posts: 58 Illinois	I just had the 727 rebuilt in my dart and it has alto clutches, koleen steels, and kevlar bands, with a griner g20b valve body. The problem is that the trans brake will not hold the car past about 2500rpms. i can hear the the brake engage and i have all gears.ANY IDEAS WHAT THE PROBLEM IS, ITS DRIVIN ME NUTS!!! 7360700-dart6.jpg (37 downloads)

Re: TRANSBRAKE NOT HOLDING [Re: bad543dart] #1295401 09/01/12 09:33 PM 09/01/12 09:33 PM
Joined: May 2004 Posts: 12,397 Taxes & Virus's R-US, NY Dragula I Live Here
Dragula I Live Here Joined: May 2004 Posts: 12,397 Taxes & Virus's R-US, NY	Reverse band or reverse servo...would be my guess. '70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft) https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car) https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car) https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9) '66 Barracuda AWB Stretched nose Blown 440 Car in build stage '71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph https://www.youtube.com/watch?v=Znuo3jMUXTk

Re: TRANSBRAKE NOT HOLDING [Re: Dragula] #1295402 09/01/12 09:43 PM 09/01/12 09:43 PM
Joined: Dec 2009 Posts: 20,647 in a cattle trailer down by th... G Guitar Jones Paddle faster! I hear banjo music!
Guitar Jones Paddle faster! I hear banjo music! G Joined: Dec 2009 Posts: 20,647 in a cattle trailer down by th...	Reverse band would be my guess as well. Is this a fresh build or did it just start doing it. My car starts to creep at about 5500 but I usually leave at 3000-4000. May just be a band adjustment. "Follow me the wise man said, but he walked behind" '92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.

Re: TRANSBRAKE NOT HOLDING [Re: Guitar Jones] #1295403 09/01/12 10:03 PM 09/01/12 10:03 PM
Joined: Jan 2003 Posts: 20,189 Park Forest, IL slantzilla Too Many Posts
slantzilla Too Many Posts Joined: Jan 2003 Posts: 20,189 Park Forest, IL	My Griner is very sensitive to shifter cable adjustment. It doesn't have to be very far off and the brake will not hold. "Everybody funny, now you funny too."

Re: TRANSBRAKE NOT HOLDING [Re: Guitar Jones] #1295404 09/01/12 10:04 PM 09/01/12 10:04 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Or line pressure

Re: TRANSBRAKE NOT HOLDING [Re: MR_P_BODY] #1295405 09/01/12 11:02 PM 09/01/12 11:02 PM
Joined: Jan 2011 Posts: 58 Illinois B bad543dart OP member
bad543dart OP member B Joined: Jan 2011 Posts: 58 Illinois	heres the other thing, i bypassed the trans cooler to check and see if it was plugged and the car held about 1000 more rpms than befor. At first it only held t0 1500 than it held to 2500 so it may be the line pressure 7360890-dart6.jpg (31 downloads)

Re: TRANSBRAKE NOT HOLDING [Re: Guitar Jones] #1295406 09/01/12 11:05 PM 09/01/12 11:05 PM
Joined: Jan 2011 Posts: 58 Illinois B bad543dart OP member
bad543dart OP member B Joined: Jan 2011 Posts: 58 Illinois	The guys that did my tranny have been doin then for years they even build them for 2000H.P.turbo cars, and several 727s. i just got off the phone withen now and they said to bring the whole car to them, but i still would like all your opinions.

Re: TRANSBRAKE NOT HOLDING [Re: bad543dart] #1295407 09/02/12 10:45 AM 09/02/12 10:45 AM
Joined: Nov 2004 Posts: 4,330 Lynchburg, VA Leon441 master
Leon441 master Joined: Nov 2004 Posts: 4,330 Lynchburg, VA	If bypassing the cooler helped? I would check that line pressure. Leon Career best 8.02 @ 169 at 3050# and 10" tires small block power.

Re: TRANSBRAKE NOT HOLDING [Re: Leon441] #1295408 09/02/12 02:53 PM 09/02/12 02:53 PM
Joined: Feb 2003 Posts: 993 Addison,IL OUTLAWSSAA super stock
OUTLAWSSAA super stock Joined: Feb 2003 Posts: 993 Addison,IL	Depending on the horsepower of the car, the line pressure should be between 140-145psi if the car is around 800-1000hp.

Re: TRANSBRAKE NOT HOLDING [Re: MR_P_BODY] #1295409 09/02/12 09:53 PM 09/02/12 09:53 PM
Joined: Oct 2007 Posts: 4,209 New York polyspheric master
polyspheric master Joined: Oct 2007 Posts: 4,209 New York	X2 Even if there is some other factor in play, it's a good idea to verify you have all the pressure you need for engagement - but not more. Boffin Emeritus

Re: TRANSBRAKE NOT HOLDING [Re: polyspheric] #1295410 09/03/12 12:38 AM 09/03/12 12:38 AM
Joined: Jan 2011 Posts: 58 Illinois B bad543dart OP member
bad543dart OP member B Joined: Jan 2011 Posts: 58 Illinois	thanks to all the replys to the post im takin it back to the shop on tuesday with it in the car and i will give them the pressure specs and all the other info u all have gave me. one other piece of info for you all is the trans brace was holding befor the rebuild. the reason for the rebuild was that the drive pac of clutches was not holding under power and the trans got very hot. If this gives anyone anyother ideas let me know. like i said when the car pulled drive it acted like it was in neutral until i let out of it then it would hold until the power band kicked in. Hopefullt this will give ya all a little more info. 7362324-dart6.jpg (29 downloads)

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