Trans low gear set.

Alan Warman · 11-18-2013, 09:20 PM

Thanks for the info Alan. I was looking for ways to make ny car faster for next year.
Trying to get the biggest bang for the buck.
Thanks Alan

Alan Roehrich · 11-19-2013, 12:49 AM

I hope that helps you find what is right for your combination. Hopefully, maybe someone with more experience with a combination like yours will step up and point you in the right direction.

greg fulk · 11-19-2013, 02:55 AM

Alan I have 2.75 low gear in my car with 5.13 & 94" slicks....

Adger Smith · 11-22-2013, 12:23 PM

Another thing to be aware of is the way a lower gear causes your converter to work like it is tighter. It won't be the same converter when you go lower on gears. The same converter issues happen with rear gear, but not as bad as when you do a low gear tranny set. Some times the converter issues are a good thing and is what actually makes for the combination to be quicker. The lower gear may really help, but the change it causes in the converter may take away any gains. What I'm saying is: Monitor the way your converter works when you change gears. There is more to look at than just an ET Slip!!! That is why it is called getting the most out of your "Combination"

Mike Taylor 3601 · 11-22-2013, 02:44 PM

When I had auto in my F/PS ran 8.30's 1/8 went from 2.45 (stock 350th 1st.?) to 2.75 low car ran the same,only differences I could measure was RT was quicker had to drop about 5-8 lbsfront tire. to hit the tree the same spot and right rear tire started getting roughed up,changed spring and fixed that.
I think converter was slightly tight before,see if this is correct? Car would run .20 faster in 1/8 off dead idle about 1000 rpm but could'nt find tree would be -.020/-.040 or +.120 could'nt hit between, bring up to 2000 rpm could hit tree good but slow down .20 in 1/8 then could get trans fluid up to 200-210 would pick up .07-.09 in 1/8
By leaving @ idle converter flashed a little more and when trans temp got 200-210 fluid thinned and raised flash also is that correct theory? Did it need a little more stall?

Found I could run 4 speed in my combo so did'nt make anymore changes to converter and went to stick

Adger Smith · 11-22-2013, 03:02 PM

I would say your conclusions about the converter were correct. It was telling you it was too tight. It was probably on the verge of too tight with the other trans ratio.
The gear ratio made nothing, but tree/lite problems. You fixed it with a variable stall controled by "The Left Leg" Now it is loose any time you want or need it!! :~) But now: how about that gear ratio??

Mike Taylor 3601 · 11-23-2013, 10:00 AM

Adger,
Had to drive the same way w/stock gear set also,I figure my low gear set did'nt help cause converter was already a little tight and w/ low gear set was tighter and took away any gains the low gear set made.Converter guy said 8'' I had was as loose as could be made w/o becoming inefficient,so I replied so then I need 7''? he said no 7 won't work in your application,could'nt get a answer that made any sense from him,was going to change companies but went back to stick.
You mean my stick gear ratio? if so 2.88 and wide open Ahhh so much more fun!!!!
I know 2.88 is a little higher first than common,but have to use stock type trans in pure stock and barely over 6K my experience has been you can get too low in first w/lower rpm combo,seems to me to work better if you can clear 60' in low gear.
I had 2 automatics,my 1st and last LOL
Mike Taylor 3601

11-18-2013, 09:20 PM	#1
Alan Warman Member Join Date: May 2002 Location: San Angelo Tx Posts: 231 Likes: 0 Liked 0 Times in 0 Posts	Re: Trans low gear set. Thanks for the info Alan. I was looking for ways to make ny car faster for next year. Trying to get the biggest bang for the buck. Thanks Alan __________________ Alan Warman STK 4107

11-19-2013, 12:49 AM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,118 Likes: 1,576 Liked 1,837 Times in 417 Posts	Re: Trans low gear set. I hope that helps you find what is right for your combination. Hopefully, maybe someone with more experience with a combination like yours will step up and point you in the right direction. __________________ Alan Roehrich 212A G/S

11-19-2013, 02:55 AM	#3
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	Re: Trans low gear set. Alan I have 2.75 low gear in my car with 5.13 & 94" slicks.... __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"

11-22-2013, 12:23 PM	#4
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: Trans low gear set. Another thing to be aware of is the way a lower gear causes your converter to work like it is tighter. It won't be the same converter when you go lower on gears. The same converter issues happen with rear gear, but not as bad as when you do a low gear tranny set. Some times the converter issues are a good thing and is what actually makes for the combination to be quicker. The lower gear may really help, but the change it causes in the converter may take away any gains. What I'm saying is: Monitor the way your converter works when you change gears. There is more to look at than just an ET Slip!!! That is why it is called getting the most out of your "Combination" __________________ Adger Smith (Former SS) Last edited by Adger Smith; 11-22-2013 at 12:24 PM. Reason: sp

11-22-2013, 02:44 PM	#5
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,372 Likes: 357 Liked 308 Times in 103 Posts	Re: Trans low gear set. When I had auto in my F/PS ran 8.30's 1/8 went from 2.45 (stock 350th 1st.?) to 2.75 low car ran the same,only differences I could measure was RT was quicker had to drop about 5-8 lbsfront tire. to hit the tree the same spot and right rear tire started getting roughed up,changed spring and fixed that. I think converter was slightly tight before,see if this is correct? Car would run .20 faster in 1/8 off dead idle about 1000 rpm but could'nt find tree would be -.020/-.040 or +.120 could'nt hit between, bring up to 2000 rpm could hit tree good but slow down .20 in 1/8 then could get trans fluid up to 200-210 would pick up .07-.09 in 1/8 By leaving @ idle converter flashed a little more and when trans temp got 200-210 fluid thinned and raised flash also is that correct theory? Did it need a little more stall? Found I could run 4 speed in my combo so did'nt make anymore changes to converter and went to stick

11-22-2013, 03:02 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: Trans low gear set. I would say your conclusions about the converter were correct. It was telling you it was too tight. It was probably on the verge of too tight with the other trans ratio. The gear ratio made nothing, but tree/lite problems. You fixed it with a variable stall controled by "The Left Leg" Now it is loose any time you want or need it!! :~) But now: how about that gear ratio?? __________________ Adger Smith (Former SS)

11-23-2013, 10:00 AM	#7
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,372 Likes: 357 Liked 308 Times in 103 Posts	Re: Trans low gear set. Adger, Had to drive the same way w/stock gear set also,I figure my low gear set did'nt help cause converter was already a little tight and w/ low gear set was tighter and took away any gains the low gear set made.Converter guy said 8'' I had was as loose as could be made w/o becoming inefficient,so I replied so then I need 7''? he said no 7 won't work in your application,could'nt get a answer that made any sense from him,was going to change companies but went back to stick. You mean my stick gear ratio? if so 2.88 and wide open Ahhh so much more fun!!!! I know 2.88 is a little higher first than common,but have to use stock type trans in pure stock and barely over 6K my experience has been you can get too low in first w/lower rpm combo,seems to me to work better if you can clear 60' in low gear. I had 2 automatics,my 1st and last LOL Mike Taylor 3601