Transmission inconsistency Question

Mark Yacavone · 07-12-2015, 08:33 PM

I never saw straight Walmart dex do that.
Maybe you're looking at the wrong fluid. Maybe it likes the oil hot.
What's in it?

Sam Capizzi Jr · 07-12-2015, 08:47 PM

Same 10w-40 Walmart oil from about 50 runs ago. Before that line came off that tranny fluid was 3 years and 400 passes old. New Trans fluid was just basic dex/mec from autozone....

Mark Yacavone · 07-12-2015, 09:11 PM

Sam, With a "challenge" combo like that, I believe I'd put about 4 and 1/2 0-20 Mobil One in it.

ss3011 · 07-12-2015, 09:17 PM

Dextron is a series of fluids that were developed by GM. GM controls the licensing of the fluid. If a company wants to sell an ATF that says Dextron on the bottle, they have to submit samples to GM, it then goes through a testing program to prove it performs like a Dextron Fluid should, and if it passes then it is allowed to be called a Dextron Fluid. Type F fluid acts quite differently then Dextron. My recommendation is to drain your mixed batch of fluid , and replace it with either Dextron, or Type F. Full synthetics seem to be the best, and seem to be more consistent cold to hot. Try and keep fluid between 150, and 200 degsF.

J.R. Haddad · 07-12-2015, 10:11 PM

Sam, you added the fluid after the line broke and picked up 2 tenths. My recommendation is as follows: STEP AWAY FROM THE CAR AND DO NOTHING!! J.R.

Adger Smith · 07-12-2015, 10:45 PM

The fluid mix could be messing with a sprag or the sprag could have been hurt when the line came off. I had a BB Mopar customer that HAD to have heat in his to make it consistant. He put a spragless converter in it and the heat issue went away.

Sam Capizzi Jr · 07-12-2015, 10:53 PM

Quote:

Originally Posted by Adger Smith

The fluid mix could be messing with a sprag or the sprag could have been hurt when the line came off. I had a BB Mopar customer that HAD to have heat in his to make it consistant. He put a spragless converter in it and the heat issue went away.

That might be it. When it came apart I was on the return road and caught it fairly quick. It still had fluid showing on the stick.

Sam Capizzi Jr · 07-12-2015, 10:51 PM

lol. Yeah the two tenths is great but it's impossible to dial in the later rounds. Cost me a lot of money in the last 3 weeks. The week it came apart I made it to the final and car picked up 7. Next week, 5 cars left with bye to the final on the line at the can am combo race. Picked up 5. And last night slowed down 18. No Bueno.

I'm going to drain it all. Use dex and see what happens.
Try a lighter weight motor and make sure trans is at 150 when staging.

07-12-2015, 08:33 PM	#1
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,815 Likes: 2,904 Liked 5,121 Times in 1,952 Posts	Re: Transmission inconsistency Question I never saw straight Walmart dex do that. Maybe you're looking at the wrong fluid. Maybe it likes the oil hot. What's in it? __________________ "We are lucky we don't get as much Government as we pay for." Will Rogers

07-12-2015, 08:47 PM	#2
Sam Capizzi Jr Member Join Date: Jul 2009 Location: Rochester NY Posts: 131 Likes: 25 Liked 43 Times in 9 Posts	Re: Transmission inconsistency Question Same 10w-40 Walmart oil from about 50 runs ago. Before that line came off that tranny fluid was 3 years and 400 passes old. New Trans fluid was just basic dex/mec from autozone.... __________________ Sam Capizzi Jr. 1301 SS/AS 93 Dodge Daytona R/SA 73 Dodge Dart

07-12-2015, 09:11 PM	#3
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,815 Likes: 2,904 Liked 5,121 Times in 1,952 Posts	Re: Transmission inconsistency Question Sam, With a "challenge" combo like that, I believe I'd put about 4 and 1/2 0-20 Mobil One in it. __________________ "We are lucky we don't get as much Government as we pay for." Will Rogers

07-12-2015, 09:17 PM	#4
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: Transmission inconsistency Question Dextron is a series of fluids that were developed by GM. GM controls the licensing of the fluid. If a company wants to sell an ATF that says Dextron on the bottle, they have to submit samples to GM, it then goes through a testing program to prove it performs like a Dextron Fluid should, and if it passes then it is allowed to be called a Dextron Fluid. Type F fluid acts quite differently then Dextron. My recommendation is to drain your mixed batch of fluid , and replace it with either Dextron, or Type F. Full synthetics seem to be the best, and seem to be more consistent cold to hot. Try and keep fluid between 150, and 200 degsF.

07-12-2015, 10:11 PM	#5
J.R. Haddad Senior Member Join Date: Jun 2012 Posts: 784 Likes: 938 Liked 1,467 Times in 307 Posts	Re: Transmission inconsistency Question Sam, you added the fluid after the line broke and picked up 2 tenths. My recommendation is as follows: STEP AWAY FROM THE CAR AND DO NOTHING!! J.R.

07-12-2015, 10:45 PM	#6
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: Transmission inconsistency Question The fluid mix could be messing with a sprag or the sprag could have been hurt when the line came off. I had a BB Mopar customer that HAD to have heat in his to make it consistant. He put a spragless converter in it and the heat issue went away. __________________ Adger Smith (Former SS)

07-12-2015, 10:51 PM	#8
Sam Capizzi Jr Member Join Date: Jul 2009 Location: Rochester NY Posts: 131 Likes: 25 Liked 43 Times in 9 Posts	Re: Transmission inconsistency Question lol. Yeah the two tenths is great but it's impossible to dial in the later rounds. Cost me a lot of money in the last 3 weeks. The week it came apart I made it to the final and car picked up 7. Next week, 5 cars left with bye to the final on the line at the can am combo race. Picked up 5. And last night slowed down 18. No Bueno. I'm going to drain it all. Use dex and see what happens. Try a lighter weight motor and make sure trans is at 150 when staging. __________________ Sam Capizzi Jr. 1301 SS/AS 93 Dodge Daytona R/SA 73 Dodge Dart