Turbo 400 shifting issue

Jim Kaekel · 09-26-2011, 04:54 PM

First, check the governor, valve may be stuck or gear is stripped, gear is nylon. Check modulator valve and be sure it isn't stuck.

ss3011 · 09-27-2011, 07:39 PM

Did it work in the burnout box, but then wouldn't shift on the pass ?

novassdude · 09-27-2011, 07:56 PM

Quote:

Originally Posted by ss3011

Did it work in the burnout box, but then wouldn't shift on the pass ?

Yes it did shift in the box. I did go to neutral after the box to clear it out.

ss3011 · 09-27-2011, 10:21 PM

It still drives in 1st, but does not shift ? Does it back up ?

novassdude · 09-28-2011, 01:45 PM

Quote:

Originally Posted by ss3011

It still drives in 1st, but does not shift ? Does it back up ?

Yes I drove it back to the pits no problem it backed up fine when we went to load it. It did shift to second on the return road when I wasn't under hard exceleration.

It just stumped me cause the first pass the tranny acted perfectly.

I am staring to think checkers is looking like a good sport.

I will probably just park it again put in the good tranny next spring.

Thanks for all the help

Mike Leopold · 09-27-2011, 10:31 PM

I have lost 2nd gear on a turbo 400 a few times over the years. The problem is usually a broken sprag on the direct drum. If the sprag won't hold torque and slips you won't have 2nd gear. if it locks up and won't freewheel, you will smoke the direct clutch when shifting to 3rd gear. One time a piece of gasket material broke off and blocked the hole in the bolt in the center support that feeds the intermediate clutch. This also resulted in no 2nd gear.

Jim Kaekel · 09-28-2011, 08:20 AM

Mike is correct, that is also a possibility. Just be sure to check the simple stuff (governor, modulator) first before you pull the unit out.

09-26-2011, 04:54 PM	#1
Jim Kaekel VIP Member Join Date: Jul 2002 Location: Michigan Posts: 1,227 Likes: 133 Liked 531 Times in 108 Posts	Re: Turbo 400 shifting issue First, check the governor, valve may be stuck or gear is stripped, gear is nylon. Check modulator valve and be sure it isn't stuck. __________________ Jim Kaekel 3836 STK

09-27-2011, 07:39 PM	#2
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: Turbo 400 shifting issue Did it work in the burnout box, but then wouldn't shift on the pass ?

09-27-2011, 10:21 PM	#4
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: Turbo 400 shifting issue It still drives in 1st, but does not shift ? Does it back up ?

09-27-2011, 10:31 PM	#6
Mike Leopold Junior Member Join Date: Aug 2003 Posts: 20 Likes: 0 Liked 0 Times in 0 Posts	Re: Turbo 400 shifting issue I have lost 2nd gear on a turbo 400 a few times over the years. The problem is usually a broken sprag on the direct drum. If the sprag won't hold torque and slips you won't have 2nd gear. if it locks up and won't freewheel, you will smoke the direct clutch when shifting to 3rd gear. One time a piece of gasket material broke off and blocked the hole in the bolt in the center support that feeds the intermediate clutch. This also resulted in no 2nd gear. __________________ Mike Leopold 593 STK

09-28-2011, 08:20 AM	#7
Jim Kaekel VIP Member Join Date: Jul 2002 Location: Michigan Posts: 1,227 Likes: 133 Liked 531 Times in 108 Posts	Re: Turbo 400 shifting issue Mike is correct, that is also a possibility. Just be sure to check the simple stuff (governor, modulator) first before you pull the unit out. __________________ Jim Kaekel 3836 STK