The Stovebolt Site Forums The Shop Area The HiPo Shop T-5 Gear Ratios

I'm reading on this website:

http://www.britishv8.org/Articles/Borg-Warner-T5-ID-Tags.htm

that fourth gear in a T-5 transmission, all T-5 transmissions, is 1:10 to 1. That's the first time I've seen this. I have always been told and thought that fourth gear was 1:00 to 1:00 direct drive. Can anyone verify this "new" information?

Joe

According to Inliners Tech Tips and several other web sites, 1 to 1 for 4th gear is the norm.

http://www.inliners.org/

John

It's got to be a typo and he copied it all the way down the chart. I went ahead and sent them a question in the contacts and questions section.

Did you see the paragraph about which fluid to use? That discussion may flare up again.

Yes, D1ck, I saw that comment about the Dextron II Fluid!

I did finally get my hands on an 1985 S-10 Owner's Manual and it plainly states in there that Dextron II fluid is to be used in the T-5 transmission, so I'm Ok with that now that I have read it in person.

It will be interesting to see what this author has to say to you about his gear ratios. Let us know!
Joe

Yeah, My list I got from the HAMB years ago shows 1 to 1. I think it's a typo or wait a minute maybe it's in British units.
http://www.mongosgarage.com/tech/t5/T5tag.htm
MONGO

OK,if fourth gear is 1 to 1,what ratio is fifth gear?

Depends on the transmission, 1-3 and 5th vary depending on what vehicle it came out of. You can look at the spreadsheet on the link I posted above to determine what the ratio's are based on the ID Tag on the trans.
Mongo

So, KCMongo, are you saying that British RPM's are different than United States RPM's? So that means in England, the world turns fast than it does here? So LP records that are 33 1/3 here are 36 1/3 (approximately 10%) there?

I did not know dat!

OK - I got it now!!

Joe

Wow! D1ck, you are good! Whatever you wrote to him has him movin' fast! He has already changed all of the 5th gear ratios on the page to 1.00:1.

I just noticed that his reverse gear and first gear ratio is backwards on T-5 transmission number 1352-145 like I've got. He has first at 3.78:1 and reverse at 3.76:1. I have first gear at 3.76:1. I guess that part is still English!

Joe

KC's right again
'''''I think it's a typo or wait a minute maybe it's in British nits. '''''

you all should know about their '''old world threads'' to confuse the germans.
BSF
BSW
MA
CEI
BA
BSP
all different threads and pitchs as well as wrench sizes.
all types of Whitworth http://www.sizes.com/tools/thread_history.htm http://www.jag-lovers.org/xk-lovers/library/whitworth_system.html
I have sets of every type here, too
they were so far ahead of themselves it left our heads spinnin'
by the way joe
they have dark suckers too http://www.msu.edu/user/dynicrai/physics/dark.htm

I believe that .86 to 1 and .73 to 1 are two ratios (for 5th gear) that were standard in models. mine is .86

Holy cow, Jim!! That is wild and wacky stuff!

Joe

I believe that .86 to 1 and .73 to 1 are two ratios (for 5th gear) that were standard in some models.

John

I got the email back from the web site and they admitted the typo. The changed the table.

I have a T5 from a 1985 S10 and it's definitely 1:1. Must be a typo.

5th gear varies. Most of the T5s that went behind a V6 had steeper ratios and work better behind a stovebolt. Many of the 4 cylinders had a 0.86:1, which is hardly worth shifting into.

0.72 and 0.73 are pretty common. Here's a list that might be useful....there are others if you do some searching.

T5 Transmissions