84 Chevy shortbed 4x4 won't go - The 1947 - Present Chevrolet & GMC Truck Message Board Network

500dallorbeauty · 03-12-2014, 07:47 PM

I have a 84 Chevy shortbed that I just changed the tranny from 700r4 to a 400 turbo with np203 transfer case. I put a tourque converter from a 350 turbo in it and now the truck won't go over 35 mph. What did I do wrong!!

ont_guy_38 · 03-12-2014, 07:58 PM

Is it shifting gears? A 700 uses a cable to shift and a 400 uses a vacuum modulator. Did you hook all that up?

500dallorbeauty · 03-12-2014, 08:56 PM

Yes it is shifting changed over cable to vacuum.

**rs74** · 03-12-2014, 09:52 PM

Does it seem like it is slipping, revving up high? Might need more details.

500dallorbeauty · 03-12-2014, 11:13 PM

Drives fine shifts fine until it gets to about 35 then motor bogs out and dies 305 all stock runs good

cadillac_al · 03-13-2014, 08:05 AM

When the motor starts bogging, can you throw it in neutral and rev it? It sounds engine related to me.

68post · 03-13-2014, 08:37 AM

Quote:

Originally Posted by cadillac_al

When the motor starts bogging, can you throw it in neutral and rev it? It sounds engine related to me.

I agree, could be related to a lack of fuel flow. Run it thru the gears hard to see want happens.

03-12-2014, 07:47 PM	#1
500dallorbeauty Registered User Join Date: Aug 2013 Location: Bonner springs kansas Posts: 19	84 Chevy shortbed 4x4 won't go I have a 84 Chevy shortbed that I just changed the tranny from 700r4 to a 400 turbo with np203 transfer case. I put a tourque converter from a 350 turbo in it and now the truck won't go over 35 mph. What did I do wrong!!

03-12-2014, 07:58 PM	#2
ont_guy_38 Registered User Join Date: Jul 2007 Location: Ontario Canada Posts: 1,006	Re: 84 Chevy shortbed 4x4 won't go Is it shifting gears? A 700 uses a cable to shift and a 400 uses a vacuum modulator. Did you hook all that up? __________________ 1985 C10 2004 Avalanche

03-12-2014, 08:56 PM	#3
500dallorbeauty Registered User Join Date: Aug 2013 Location: Bonner springs kansas Posts: 19	Re: 84 Chevy shortbed 4x4 won't go Yes it is shifting changed over cable to vacuum.

03-12-2014, 09:52 PM	#4
rs74 Senior Member Join Date: Jun 2010 Location: Illinois Posts: 2,957	Re: 84 Chevy shortbed 4x4 won't go Does it seem like it is slipping, revving up high? Might need more details. __________________ Roy 85 Short Bed Silverado- Work in progress. http://67-72chevytrucks.com/vboard/s...d.php?t=564818 1987 R10 shortie

03-12-2014, 11:13 PM	#5
500dallorbeauty Registered User Join Date: Aug 2013 Location: Bonner springs kansas Posts: 19	Re: 84 Chevy shortbed 4x4 won't go Drives fine shifts fine until it gets to about 35 then motor bogs out and dies 305 all stock runs good

03-13-2014, 08:05 AM	#6
cadillac_al Registered User Join Date: Oct 2013 Location: Maine Posts: 2,357	Re: 84 Chevy shortbed 4x4 won't go When the motor starts bogging, can you throw it in neutral and rev it? It sounds engine related to me. __________________ 76 Chevy K20 76 GMC K15 77 Chevy C10 77 Chevy K10



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