tranny slip

66StangGuy · 10-28-2002, 01:25 AM

my friends 66 mustang has just started this problem.. when going from a stop the trasmission will slip.. meaning when she starts to press the gas pedal the rpm's will go up but the car will not move. then after about 2 or 3 seconds the tranny will go into gear. this has just started happening after no other changes.. this car is otherwise very well taken care of. I know that it is not a low fluid problem becase fluid has ben added to make shure of this. what could cause this and it is difficult to fix? any info on c4 sites will help..thanks

66 mustang 289 2bbl high compression heads. stock tranny and gears. driven by typical highschool teenager. thanks for your help guys..

Rev · 10-28-2002, 08:40 PM

Sounds like low line pressure to me. Probably the transmission oil pump not up to snuff. My bet is that it will need a rebuild in the not too distant future. I'm not really an expert on transmissions though. Just my guess.

Rev

tfish · 10-30-2002, 03:36 PM

My son and I just got done getting his tranny problems worked out..his car had been sitting indoors for 14 years and all the o-rings in the tranny where shot..we tried to rebuid it and learned alot..Tried being a key word..we ordered a rebuilt one form one of the mags and had terrible luck with it. Luckily they gave us great customer service and refunded his money. Ended up taking the orginal tranny to the shop that fixed our mistakes and now it works pefectly..and the transgo shift kit is a nice touch..
T and A

RBatson · 10-30-2002, 10:31 PM

6T9PONY · 11-01-2002, 02:17 PM

Might possibly be something real simple like needing new (not more, just new) fluid and a new filter. If the filter's clogged it can cause slipping.....Hopefully it's a simple problem like this, rather than needing a rebuild. Good luck.....

Gearhead999 · 11-03-2002, 08:11 AM

If no one has been in the trans. pan...sounds like trans. is on the way out. O rings are hard and pressure is low.

C-4's have a screen type filter with a poppet valve under them that can be cleaned. BUT, you have to put the valve and spring back in. MANY, MANY people forget them, or don't see them and destroy the trans.

Transmission needs overhaul.

10-28-2002, 01:25 AM	#1
66StangGuy Registered Member Join Date: Feb 2002 Location: Diamond Bar Posts: 258	tranny slip my friends 66 mustang has just started this problem.. when going from a stop the trasmission will slip.. meaning when she starts to press the gas pedal the rpm's will go up but the car will not move. then after about 2 or 3 seconds the tranny will go into gear. this has just started happening after no other changes.. this car is otherwise very well taken care of. I know that it is not a low fluid problem becase fluid has ben added to make shure of this. what could cause this and it is difficult to fix? any info on c4 sites will help..thanks 66 mustang 289 2bbl high compression heads. stock tranny and gears. driven by typical highschool teenager. thanks for your help guys.. __________________ 66 mustang-292-Holley 4160-World Castings Windsor Sr.-Hooker super comp headers-MSD box & Coil.3.55 gears. B&M Z-Gate-Black leather racing seats with 4pt harnes.

10-28-2002, 08:40 PM	#2
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Low line pressure Sounds like low line pressure to me. Probably the transmission oil pump not up to snuff. My bet is that it will need a rebuild in the not too distant future. I'm not really an expert on transmissions though. Just my guess. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

10-30-2002, 10:31 PM	#4
RBatson Registered Member Join Date: May 1997 Posts: 3,028	test

11-03-2002, 08:11 AM	#6
Gearhead999 Registered Member Join Date: Sep 1998 Location: Oviedo, FL Posts: 992	If no one has been in the trans. pan...sounds like trans. is on the way out. O rings are hard and pressure is low. C-4's have a screen type filter with a poppet valve under them that can be cleaned. BUT, you have to put the valve and spring back in. MANY, MANY people forget them, or don't see them and destroy the trans. Transmission needs overhaul. __________________ "Support our Troops" Dave 1968 Cougar 2004 Thunderbird 2007 F150 Harley-Davidson, SuperCrew 1986 LTD 1997 Ranger 1992 Honda Civic

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10-30-2002, 03:36 PM	#3
tfish Registered Member Join Date: Nov 2001 Location: Santa Rosa CA Posts: 35	My son and I just got done getting his tranny problems worked out..his car had been sitting indoors for 14 years and all the o-rings in the tranny where shot..we tried to rebuid it and learned alot..Tried being a key word..we ordered a rebuilt one form one of the mags and had terrible luck with it. Luckily they gave us great customer service and refunded his money. Ended up taking the orginal tranny to the shop that fixed our mistakes and now it works pefectly..and the transgo shift kit is a nice touch.. T and A

11-01-2002, 02:17 PM	#5
6T9PONY All about the Windsor. Join Date: Feb 2000 Posts: 2,052	Might possibly be something real simple like needing new (not more, just new) fluid and a new filter. If the filter's clogged it can cause slipping.....Hopefully it's a simple problem like this, rather than needing a rebuild. Good luck.....