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Limp mode tow?

PostPosted: Sun Feb 05, 2017 11:57 pm
by Ryan
could I tow my car on a tow dolly if I put it in fwd limp mode or removing the driveshaft?

Re: Limp mode tow?

PostPosted: Mon Feb 06, 2017 1:40 am
by Nobody
Tsrm Does not recomend dolly on front wheels only. Would want to put a dolly on the rear and crane the front up.

If you leave the rears on the ground the front wheels need to spin freely otherwise the drivetrain could heat up and burn out.

Tsrm shows tow strap is OK too. As long as the front's and rears are turning together should be ok. Car in neutral and parking brake off.

Took a screenshot of the page in the tsrm but I'm not seeing a way to upload it.

Re: Limp mode tow?

PostPosted: Mon Feb 06, 2017 10:50 am
by MWP
Nobody wrote:Tsrm Does not recomend dolly on front wheels only. Would want to put a dolly on the rear and crane the front up.
If you leave the rears on the ground the front wheels need to spin freely otherwise the drivetrain could heat up and burn out.
Tsrm shows tow strap is OK too. As long as the front's and rears are turning together should be ok. Car in neutral and parking brake off.


That sounds like the TSRM for a ST205.
The ST185's have the FWD selection lever on the gearbox for exactly this purpose.

Re: Limp mode tow?

PostPosted: Mon Feb 06, 2017 12:24 pm
by FC Zach
MWP wrote:
Nobody wrote:Tsrm Does not recomend dolly on front wheels only. Would want to put a dolly on the rear and crane the front up.
If you leave the rears on the ground the front wheels need to spin freely otherwise the drivetrain could heat up and burn out.
Tsrm shows tow strap is OK too. As long as the front's and rears are turning together should be ok. Car in neutral and parking brake off.


That sounds like the TSRM for a ST205.
The ST185's have the FWD selection lever on the gearbox for exactly this purpose.


It does explain this and show pictured examples of proper towing methods for a 185 in my manual, it never said anything about switching the lever.

I may have overlooked that, I'll have to check to see if that's an option next time I'm in the book.

Re: Limp mode tow?

PostPosted: Mon Feb 06, 2017 2:25 pm
by 88_ST165
Ryan wrote:could I tow my car on a tow dolly if I put it in fwd limp mode or removing the driveshaft?



Yes you can, IF you disconnect the driveshaft at the rear diff, and make SURE you're using a dolly that is supporting front wheels IE: no flat tow (front wheels turning).

You wont have to adjust the AWD/FWD mode selector.

Re: Limp mode tow?

PostPosted: Mon Feb 06, 2017 3:18 pm
by underscore
If you use the selector I believe you need to tow it with the front wheels on the ground and the rear wheels in the air, otherwise you'll break things. Make absolutely sure you put the selector in the correct position and put the bolt back in tightly, there's a story of a guy who dyno'd in 2WD mode but didn't put the bolt in, the selector shook out of 2WD mode while on the dyno and things got broken.

Re: Limp mode tow?

PostPosted: Wed Feb 08, 2017 9:39 am
by MWP
underscore wrote:If you use the selector I believe you need to tow it with the front wheels on the ground and the rear wheels in the air, otherwise you'll break things.


What would break?

Re: Limp mode tow?

PostPosted: Wed Feb 08, 2017 12:23 pm
by FC Zach
FC Zach wrote:
MWP wrote:
Nobody wrote:Tsrm Does not recomend dolly on front wheels only. Would want to put a dolly on the rear and crane the front up.
If you leave the rears on the ground the front wheels need to spin freely otherwise the drivetrain could heat up and burn out.
Tsrm shows tow strap is OK too. As long as the front's and rears are turning together should be ok. Car in neutral and parking brake off.


That sounds like the TSRM for a ST205.
The ST185's have the FWD selection lever on the gearbox for exactly this purpose.


It does explain this and show pictured examples of proper towing methods for a 185 in my manual, it never said anything about switching the lever.
Hi
I may have overlooked that, I'll have to check to see if that's an option next time I'm in the book.


There are specific instructions in regards to towing, within the manual. I double checked and nothing is mentioned about the use of this selector.

Edit: ". . nothing is mentioned about the use of this selector." Except to leave alone "no special operation necessary".

Re: Limp mode tow?

PostPosted: Wed Feb 08, 2017 4:33 pm
by underscore
MWP wrote:
underscore wrote:If you use the selector I believe you need to tow it with the front wheels on the ground and the rear wheels in the air, otherwise you'll break things.


What would break?


It's a piece inside the transmission, from memory it's the part that the selector moves to disconnect the rear wheels. It can handle moving a few feet, but if the rear wheels turn at any significant speed it will break.

edit: from here: viewtopic.php?f=43&t=43503&start=30

loudstealthGT-Four wrote:
sleeper wrote:There is a guy here with a (tjdubble07) who tuned his high hp car in 2wd mode, and if i`m not remembering wrong, he found out that the gearbox would take about 500ft punds before it broke in fwd mode.


HAHA yea just DON'T drive on the road in FWD mode as it only takes a couple minutes for this to happen
Image

which is this part in the centre diff
Image