T5 manual trans

[DanOlson]

I believe he's talking about the holes that needed to be filled, drilled, and tapped. In MY situation, two of the T5 mounting holes encroched on two of the existing holes used for the original 4-speed. What the shop did in MY case was thread in a bolt or stud into the bellhousing holes, weld it from the inside, and grind or machine it flush with the outside mounting surface. They then were able to stand the combination on end like Ed shows erlier in this thread, transfer the hole locations, drill, and tap. I must stress, with the different T5's and different bellhousing combination, filling and drilling holes may or may not be necessary.

[Don Coatney]

Here is what I did. Keep in mind this is a Plymouth P-15 car (not a truck) bell housing.

[Merle Coggins]

Merle;

At what RPM? With my 3.55/1 differential my engine is spinning around 2200 RPM's at 70MPH in overdrive.

For a speed calculator follow this link to the Tod Fitch web page.

http://www.ply33.com/Misc/speed

I dont know what the RPM is since I don't have a tach. I've been contemplating running a wire into the cab from my distributor so that I can connect my tach/dwell meter to see what it is.

According to Tod's calculator I'd be around 3000 RPM @ 70 MPH

Merle

[Young Ed]

Here is a different view of mine. The 4 bolts are standing on my marks for the new holes. This is before I drilled them. You can see the 4 original holes from the 3spd.

[DanOlson]

I had no idea that the car bellhousing was that much narrower. From the pic, you can barely make out the two holes on the left side that were filled.

[Don Coatney]

I had to "bob" the ears on my T-5 and re-drill new holes.

[Dave72dt]

ok i found out what my trucks ratio is. It is 3.73 would i have to REALLY have to have my RPMs up to shift in to 5th or would it be like shifting normally like the truck came stock with a T5?

The ODs That I have driven shift just fine. My more modern vehicles with them in experience about a 500/600 rpm drop at 55. I generally shift it OD somewhere around 40 to 45. The V8 runs at about 1600 rpm and the 4 cyl at about 2100 at 55. The difference is in the torque available. The 3.73's will work fine with or without the T5. It just won't accelerate as fast in 5th as it will in 4th and it will slow down more on hills. It will save you some on fuel and on long runs may be a little easier on the engine. All gear ratios are a compromise. Get something on one end and give something up in exchange on the other.

[tysouthwick]

What would the highway gas mileage be like with the T5?

[Dave72dt]

Depends on how much high speed driving you do. Spend a lot of time in the 50 to 70 range maybe 2 or 3 mpg. Spend very little time at those speeds, less of an advantage. If you're after mpgs, there's a lot of things that can be done to help it out. If it's rpm, you're dealing with available torque, gear ratios and tire diameter.

[Don Coatney]

What would the highway gas mileage be like with the T5?

Who cares? If gas were ten bucks per gallon I would still drive my P-15 the same way I drive it today. If I wanted gas mileage I would buy a smart (or dumb) car. I have never checked my MPG averages because I dont care.

[Dave72dt]

Don's right. On our old classics, who really cares. My daily driver is different. Although I don't drive it much, it gets 11 mpg being very nice to it and less when I'm not, but it'll pull anything I put behind it.

[dudford]

Sorry to dredge up the past I see this post was from around 2010 when we were all younger men, however, I didn't want to catch flack for not searching through prior threads!

 

So my dilema regards an 1989 Chevy S10 engine and Manual Gearbox from a 1989 2.5ltr chevy I've seen on ePay.  Mentioned this to Young Ed last night on the Chat function and on recommendation I've asked the seller whether the speedo is mechanical or electronic, yet to get an answer.  I also asked if it was a 4x2 and what sort of condition it is in.  Is there anything else I might need to know?  Am I making a grave error assuming that a 1989 transmission can be adapted?

 

Cheers chaps!

[Don Coatney]

I recommend you NOT buy a T-5 from a diesel powered S-10. If I recall there is a difference in the length of the input shaft.

 

[John-T-53]

Is the 2.5 a diesel?

 

The shorter input shaft is what works. The longer is too long for the truck setup.

 

Ask the seller what the ratios are. He prob won't know, so then ask for the tag number on the tranny and then you can look it up!

 

Good luck.

[dudford]

I recommend you NOT buy a T-5 from a diesel powered S-10. If I recall there is a difference in the length of the input shaft.

 

Thanks Don, not sure what it is yet, still awaiting an answer...

 

Is the 2.5 a diesel?

 

The shorter input shaft is what works. The longer is too long for the truck setup.

 

Ask the seller what the ratios are. He prob won't know, so then ask for the tag number on the tranny and then you can look it up!

 

Good luck.

Auction ends tomorrow at noon and its the evening now so chances of a tag number are slim.  I might have to take a punt and sell on if its no good for me.  I'm not sure if the diesel would've been 2.5l seems pretty small for a 4 cyl.  If it stays at £50 I'll have a go, not a fan of going in blind but when needs must

[Young Ed]

You should be good. According to google the diesel was a 2.2. The 2.5 is a gasoline engine refered to as the iron duke. I should have rememberd that. My first car a 89 century had one.

[Don Coatney]

The longer one is what I needed.

[Young Ed]

This is the info decal on mine. This translates to this 

1352-145 GM 1985-86 S-Truck 2.5 L4-2.8 V6 R 3.76 3.78 2.18 1.42 1.00 0.7

 

from here

 http://www.britishv8.org/articles/borg-warner-t5-id-tags.htm

 

[dudford]

This is the info decal on mine. This translates to this 

1352-145 GM 1985-86 S-Truck 2.5 L4-2.8 V6 R 3.76 3.78 2.18 1.42 1.00 0.7

 

from here

 http://www.britishv8.org/articles/borg-warner-t5-id-tags.htm

 

OK I won the engine and gearbox, only bidder (good or bad thing, not sure?!) Got confirmation that it is a petrol engine with cable speedo, all in I got it for £50 ($78).

 

If it is what I'm told it is, this will be the relevent details & ratios thanks Ed.

 

1352-193 GM 1989 S-Truck 2.5L L4 Only P 3.76 4.03 2.37 1.49 1.00 0.86

[Young Ed]

Your ratios are slightly different that mine and you have less OD reduction. All that really means is you might want a slightly different rear end ratio. Looks like a good deal. I traded a 3.73 rear end for mine which I paid about $100 bucks for and eventually helped install too!

[dudford]

In need of schooling...

 

I've had a few messages assuring me that a 1989 S-10 T5 will not have a mechanical/cable speedo but an electronic one instead... hmm, annoying to say the least

 

I did one helluva amount of researching and googling to narrow down on some tech info and found this by HAMBs Tech Editor Flat Ernie:

 

"WHICH T-5 TO USE

S10

The S10 T-5 has garnered most of the attention due to its favorable shifter location.

The S10, however, was a NWC unit through ’92. There are two basic gearsets available

in the S10 T-5:


1^st – 4.03 2^nd – 2.37 3^rd – 1.49 4^th – 1.00 5^th – 0.86
1^st – 3.76 2^nd – 2.18 3^rd – 1.41 4^th – 1.00 5^th – 0.72


As a general rule of thumb, regardless of engine, ALL S10 T-5 prior to ’85 received the

4.03 gear set, while ALL S10 T-5 after ’86 got the 3.76 gearset. The “S10” T-5 was also

available in the equivalent GMC T-truck.


The speedometer changed to electronic with the ’90 model year, however, some ’89

model T5 came with electronic speedos if they were equipped with the optional digital

dash. These can prove problematic for swaps, but output shafts & tail housings can be

swapped with cable-driven speedo models."

 

So Flat Ernie points out that there is a possibility that it is mechanical.

 

The chap I bought the the T5 off has told me that it is cable operated.  He wont be pulling the engine and trans out until tomorrow and I wont have to go down and get it until Sunday maybe Monday.  Thing is, as ever, you never know how much someone might know and it might've been a guess. 

 

Am I right in thinking that an electric speedo will be stark raving obvious with electrical contacts at the plug in on the S10 T5 tailhousing?!

 

In other news I sent Tom Langdon an email to ask about shipping the adapter to the UK, fingers crossed that'll be OK.

[Young Ed]

Am I right in thinking that an electric speedo will be stark raving obvious with electrical contacts at the plug in on the S10 T5 tailhousing?!

 

In other news I sent Tom Langdon an email to ask about shipping the adapter to the UK, fingers crossed that'll be OK.

 

Yes you are right. Rather than having a threaded piece for the speedometer cable there is just a wiring plug. Can't miss it. I believe you have to swap tailshaft housings and push a gear onto the tailshaft to convert. For a truck bellhousing that kit is the way to go.

[Plymouthy Adams]

never messed with the T5 but a S10 with the 700R4 I swapped the speedo sensor..was just dropping the tailshaft and swapping out the different senders....

[48Dodger]

"Plymouthy Adams"......lol.

 

Welcome to the forum.

 

48D

[Merle Coggins]

"Plymouthy Adams"......lol.

 

Welcome to the forum.

 

48D

 

Just another member of the Adams Family...