T5 swap: How much tunnel clearance for a slip yoke?

Shinchan · 10-14-2020, 05:09 PM

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?

Harlard · 10-14-2020, 05:42 PM

Just run it

Benjam83 · 10-15-2020, 12:23 PM

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

Shinchan · 10-19-2020, 10:30 AM

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

Quote:

Originally Posted by Benjam83

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

JohnMc · 10-19-2020, 10:33 AM

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 · 10-19-2020, 11:03 AM

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

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.

JohnMc · 10-19-2020, 11:23 AM

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.

Benjam83 · 10-20-2020, 11:01 AM

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.

Shinchan · 10-23-2020, 10:51 AM

Got the car moving under its own power last night, and so far no sign of the yoke rubbing on the tunnel.

vertigosity · 10-23-2020, 10:32 PM

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.

Benjam83 · 10-25-2020, 09:58 PM

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...

10-14-2020, 05:09 PM	#1
Shinchan Board Member Join Date: Jun 2018 Location: Lafayette, CO	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?

10-15-2020, 12:23 PM	#3
Benjam83 Moar Volvos than Queen B Join Date: May 2003 Location: Peoria Illinois	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

10-19-2020, 10:33 AM	#5
JohnMc PV Abuser Join Date: May 2004 Location: St. Louis	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

10-23-2020, 10:32 PM	#10
vertigosity Board Member Join Date: Jul 2008 Location: Memphis, TN	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

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10-19-2020, 11:23 AM	#7
JohnMc PV Abuser Join Date: May 2004 Location: St. Louis	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.

10-20-2020, 11:01 AM	#8
Benjam83 Moar Volvos than Queen B Join Date: May 2003 Location: Peoria Illinois	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.

10-23-2020, 10:51 AM	#9
Shinchan Board Member Join Date: Jun 2018 Location: Lafayette, CO	Got the car moving under its own power last night, and so far no sign of the yoke rubbing on the tunnel.

10-25-2020, 09:58 PM	#11
Benjam83 Moar Volvos than Queen B Join Date: May 2003 Location: Peoria Illinois	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...