86 4 x 4 transmission doesn't downshift - The 1947 - Present Chevrolet & GMC Truck Message Board Network

RShaips · 04-15-2004, 10:40 PM

I bought an 86 4 x 4 for my son, he just turned 13 , I know he still has a while before he can drive it but it was too nice to pass up. It has been a while but I also owned an 85 that was similar. Anyway this thing is about the slowest truck on the road,it is completly stock 305 with automatic. It seems to run good just is very slow.maybe my perception is bad since I have been driving my 67 SB with a built 383 ! the transmission doesn't downshift as easy as it should, basically have to floor it to get it to downshift. Is there any adjustment that can be made ? What should this thing be timed at, I have moved the distributer around and have gotten it to run better but it will ping when I advance it that far. Thanks for the help.

*1FaastC10* · 04-16-2004, 12:21 AM

what trans is it running?

RShaips · 04-16-2004, 12:40 AM

Its a 1/2 ton Didn't they only come with the 700R ?

Slonaker · 04-16-2004, 01:20 AM

My '86 2WD has a TH350C. I don't know about the 4WDs, though.

Slonaker

*1FaastC10* · 04-16-2004, 01:44 AM

could be a 350C, 400, or a 700R4, and all are very different...

RShaips · 04-16-2004, 08:30 PM

It is a 4 speed automatic, I assumed that the 700R was the only one that had overdrive on it.

*1FaastC10* · 04-16-2004, 10:59 PM

RShaips, it is in fact a 700R4, you didnt mention anything about overdrive in your initial post, so there was no way for us to know. i would start by changing the fluid and filter, and adjusting your TV cable as per www.73-87.com, then let us know whats happening from there.

RShaips · 04-17-2004, 12:41 AM

That web site did not work,what I need to know is how to adjust the TV cable, Thanks

RShaips · 04-17-2004, 12:54 AM

Nevermind I found what I was looking for on that site and I will try it tommorrow. Thanks

04-15-2004, 10:40 PM	#1
RShaips Senior Member Join Date: Jun 2002 Location: Augusta Missouri Posts: 804	86 4 x 4 transmission doesn't downshift I bought an 86 4 x 4 for my son, he just turned 13 , I know he still has a while before he can drive it but it was too nice to pass up. It has been a while but I also owned an 85 that was similar. Anyway this thing is about the slowest truck on the road,it is completly stock 305 with automatic. It seems to run good just is very slow.maybe my perception is bad since I have been driving my 67 SB with a built 383 ! the transmission doesn't downshift as easy as it should, basically have to floor it to get it to downshift. Is there any adjustment that can be made ? What should this thing be timed at, I have moved the distributer around and have gotten it to run better but it will ping when I advance it that far. Thanks for the help.

04-16-2004, 01:20 AM	#4
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	My '86 2WD has a TH350C. I don't know about the 4WDs, though. Slonaker __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

04-16-2004, 12:21 AM	#2
1FaastC10 Account Suspended Join Date: Oct 2002 Location: Elkhart, IN Posts: 6,399	what trans is it running?

04-16-2004, 12:40 AM	#3
RShaips Senior Member Join Date: Jun 2002 Location: Augusta Missouri Posts: 804	Its a 1/2 ton Didn't they only come with the 700R ?

04-16-2004, 01:44 AM	#5
1FaastC10 Account Suspended Join Date: Oct 2002 Location: Elkhart, IN Posts: 6,399	could be a 350C, 400, or a 700R4, and all are very different...

04-16-2004, 08:30 PM	#6
RShaips Senior Member Join Date: Jun 2002 Location: Augusta Missouri Posts: 804	It is a 4 speed automatic, I assumed that the 700R was the only one that had overdrive on it.

04-16-2004, 10:59 PM	#7
1FaastC10 Account Suspended Join Date: Oct 2002 Location: Elkhart, IN Posts: 6,399	RShaips, it is in fact a 700R4, you didnt mention anything about overdrive in your initial post, so there was no way for us to know. i would start by changing the fluid and filter, and adjusting your TV cable as per www.73-87.com, then let us know whats happening from there.

04-17-2004, 12:41 AM	#8
RShaips Senior Member Join Date: Jun 2002 Location: Augusta Missouri Posts: 804	That web site did not work,what I need to know is how to adjust the TV cable, Thanks

04-17-2004, 12:54 AM	#9
RShaips Senior Member Join Date: Jun 2002 Location: Augusta Missouri Posts: 804	Nevermind I found what I was looking for on that site and I will try it tommorrow. Thanks



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.