home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > performance & modifications

Reply
 
Thread Tools Display Modes
Old 10-14-2020, 05:09 PM   #1
Shinchan
Board Member
 
Join Date: Jun 2018
Location: Lafayette, CO
Default T5 swap: How much tunnel clearance for a slip yoke?

Finally getting things where I need to to measure for the length of the front driveshaft for my T5 swap in my 142. Unfortunately I wasn't paying attention and the T5 slip yoke that I got is a 1330 instead of a 1310. The yoke rotates freely, and at the tightest point of the rotation it comes within about 3/16-1/4" of the tunnel. Is this enough clearance, or am I going to have to bite the bullet and buy another $80 slip yoke?
Shinchan is offline   Reply With Quote
Old 10-14-2020, 05:42 PM   #2
Harlard
Hurlurd?Harland?Bueller?
 
Harlard's Avatar
 
Join Date: May 2007
Location: PDX
Default

Just run it
__________________


Herr Harlard am Erstens

1979 242 DL

Quote:
Originally Posted by t8fanning View Post
My knob has a big chunk of steel on it
Harlard is offline   Reply With Quote
Old 10-15-2020, 12:23 PM   #3
Benjam83
Moar Volvos than Queen B
 
Join Date: May 2003
Location: Peoria Illinois
Default

Kind of on-topic....If you switch slip-yokes, do you need to have the DS re-balanced?
__________________
Ben

12 WRX Hatchback
10 Subaru Outback
93 245 m47
Benjam83 is offline   Reply With Quote
Old 10-19-2020, 10:30 AM   #4
Shinchan
Board Member
 
Join Date: Jun 2018
Location: Lafayette, CO
Default

Most shops don't balance with the slipyoke, so I would assume not.

Quote:
Originally Posted by Benjam83 View Post
Kind of on-topic....If you switch slip-yokes, do you need to have the DS re-balanced?
Shinchan is offline   Reply With Quote
Old 10-19-2020, 10:33 AM   #5
JohnMc
PV Abuser
 
JohnMc's Avatar
 
Join Date: May 2004
Location: St. Louis
Default

Just run it. It will self-clearance as needed.

But srsly, it sort of depends on your trans mount, and to a lesser amount your engine mounts - how much they let the trans end wiggle around.
__________________
'63 PV Rat Rod
'93 245 16VT Classic #1141
JohnMc is offline   Reply With Quote
Old 10-19-2020, 11:03 AM   #6
Shinchan
Board Member
 
Join Date: Jun 2018
Location: Lafayette, CO
Default

heavy-duty engine mounts, and a firm poly trans mount to a solid cross-member.
The mount is pretty close to the tail of the trans. I'm going to run it and see what happens.
If I have clearance issues then I'll swap out the slip.

Quote:
Originally Posted by JohnMc View Post
Just run it. It will self-clearance as needed.

But srsly, it sort of depends on your trans mount, and to a lesser amount your engine mounts - how much they let the trans end wiggle around.
Shinchan is offline   Reply With Quote
Old 10-19-2020, 11:23 AM   #7
JohnMc
PV Abuser
 
JohnMc's Avatar
 
Join Date: May 2004
Location: St. Louis
Default

I initially ran my T5 on a stock mount (chunk of angle iron between it and the T5) and that was pretty wiggly. Then I used a Yoshifab crossmember and a solid poly T5 mount, far, far less wiggling around with that.
JohnMc is offline   Reply With Quote
Old 10-20-2020, 11:01 AM   #8
Benjam83
Moar Volvos than Queen B
 
Join Date: May 2003
Location: Peoria Illinois
Default

I've got the same Yoshifab setup, and just a regular slip-yoke. I've got a few little odds&ends that I need to wrap up, but I think it should be drivable the next time I get over there to work on it.
Benjam83 is offline   Reply With Quote
Old 10-23-2020, 10:51 AM   #9
Shinchan
Board Member
 
Join Date: Jun 2018
Location: Lafayette, CO
Default

Got the car moving under its own power last night, and so far no sign of the yoke rubbing on the tunnel.
Shinchan is offline   Reply With Quote
Old 10-23-2020, 10:32 PM   #10
vertigosity
Board Member
 
vertigosity's Avatar
 
Join Date: Jul 2008
Location: Memphis, TN
Default

When I did the T5 swap in my '80 16VT, I started out with a 1330 U-joint yoke driveshaft that came with my transmission (SN95 V6), and it definitely made contact with the body under load with a stock Mustang style rubber transmission mount - but was fine under daily/street conditions. A 1310 was fine in it, as well as on the similarly-placed TKO on my '93 LSx car.
__________________
93 245 5.3L LSx / 90 Miata / 90 Spec Miata
vertigosity is offline   Reply With Quote
Old 10-25-2020, 09:58 PM   #11
Benjam83
Moar Volvos than Queen B
 
Join Date: May 2003
Location: Peoria Illinois
Default

So, I just got my swap on the road for the first time last night. It's just got the regular style slip-yoke. One of my big concerns in this endeavor has been all of the talk around vibrations and noise.

All I did was eye-ball the driveshaft alignment. I was just trying to make it drivable. Took it for a couple test drives, about 20 minutes total. So far, it's great. I mean, the whole reason for the swap was the issue with m47s bearing deteriorating and being noisy in 3rd and 5th. At this point, I'd call this is a success in my book...
Benjam83 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 10:34 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.