Transmission skipping second gear

MI30189

MEMBER
1977 FORD E-SERIES VAN
5.8L
V8
2WD
AUTOMATIC
130,000 MILES

I have an e-150 van, 351w, automatic (C-6). I had the transmission rebuilt about eight to ten years ago, but have only put about 200 miles on it since then. The van has sat for the last three to five years, I had engine rebuilt and when I tried to drive it, I noticed that it was skipping second gear. When you start to slow down it sounds and feels like it is banging into gear. Please help me get it running again. Thank you, M

10 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,643 POSTS

Hello,

It sound like the transmission vacuum modulator line fell off can you check the vacuum source and connection to the modulator?

Cheers, Ken

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Saturday, October 6th, 2018 AT 4:21 PM

MI30189

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Hi Ken,
Thank you for the start to my problem. I will look into it tomorrow. I appreciate your time.
Thank you,
Mark

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Tuesday, October 30th, 2018 AT 12:17 PM

MI30189

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Hi Ken
Thank you for responding so fast. No throttle pressure rod on this model. I had changed the fluid and filter just last month. Help
Thanks,
Mark

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Tuesday, October 30th, 2018 AT 12:33 PM

KEN L

MASTER CERTIFIED MECHANIC
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It sounds like something inside the transmission let go like an accumulator seal, might be time for a rebuild. I would try a new vacuum modulator just to see what happens might be worth a try. Make sure the vacuum supply is good.

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Wednesday, October 31st, 2018 AT 10:34 AM

MI30189

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Thank you Ken
You have been quite helpful, so on my next day off, I will start tearing it down, I have nothing to lose now. Will let you know.
Thank you,
Mark

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Wednesday, October 31st, 2018 AT 12:44 PM

KEN L