new 7004r rolls in park - The 1947 - Present Chevrolet & GMC Truck Message Board Network

crm318 · 02-01-2007, 01:37 PM

i have just installed a 700r4 into a friends 1976 chevy van. i have attached the shifter and the thing roll reguardless of what gear its in. what might be causing this? how many gears does the 700r4 have that the shifter could go through?

75sierraclassic · 02-01-2007, 02:21 PM

Are you sure that you have the gear selector indexed correctly? It should have 7 positions. Park, Reverse, Neutral, Overdrive, 3,2,1.
The previous tranny probably only had 6 positions.

Slonaker · 02-01-2007, 02:32 PM

You could always pop the linkage off, and try to put it in park by hand. That way you'll know for sure if the problem is the trans or the linkage.

Slonaker

BTW, hello from just down IH35.

I went to SWT in the 90s.

krue · 02-01-2007, 02:46 PM

I'd disconnect the linkage, place it in park on the tranny, see if it doesn't roll. If it doesn't roll, put the shifter in Park and connect the linkage and see what happens.

crm318 · 02-01-2007, 11:05 PM

well the original transmision was a th350. when i jam the shifter all the way to park, it goes as far down as it goes and still rolls. i will do it by hand and get back to yall.

DirtyLarry · 02-01-2007, 11:25 PM

I have seen brand new transmissions come in from GM hydromatic and Allison with missing park pawl tangs on brand new trucks before. Maybe your trans builder forgot to install the tang. Disconnect the linkage then shift the trans into park by the selector shaft on the actual transmission first though, as others have stated.

MylilBowTie · 02-02-2007, 12:22 AM

I would take the linkage off the transmission and turn the U-shape gear selector on the transmission all the way clockwise. It should have park if everything is right with the transmission. The U-shape piece is different from a truck to a van and they don't swap in one another at all. It will bolt up and work but your wont have park. On the van when its in park the u-shape piece on the trans should be strait up and down like 12 and 6. The one for a truck when its in park is slanted like about 10 and 4 all the way clock wise in park.

I don't think the shifter should need adjusted to get park . The only thing I would say it would need adjusted for is to get 1st gear. But that will keep the other gears from being right. The steering column is for a three speed not four so it doesn't let it down in 1st gear. You should be able to get all the other gears fine (Park Neutral Overdrive Drive Manual 2nd).

02-01-2007, 01:37 PM	#1
crm318 Alright Alright Alright Join Date: Mar 2004 Location: Midland, Texas Posts: 1,672	new 7004r rolls in park i have just installed a 700r4 into a friends 1976 chevy van. i have attached the shifter and the thing roll reguardless of what gear its in. what might be causing this? how many gears does the 700r4 have that the shifter could go through? __________________ 1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies

02-01-2007, 02:21 PM	#2
75sierraclassic Registered User Join Date: Jun 2002 Location: Kansas City, MO Posts: 186	Re: new 7004r rolls in park Are you sure that you have the gear selector indexed correctly? It should have 7 positions. Park, Reverse, Neutral, Overdrive, 3,2,1. The previous tranny probably only had 6 positions.

02-01-2007, 02:32 PM	#3
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	Re: new 7004r rolls in park You could always pop the linkage off, and try to put it in park by hand. That way you'll know for sure if the problem is the trans or the linkage. Slonaker BTW, hello from just down IH35. I went to SWT in the 90s. __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado Last edited by Slonaker; 02-01-2007 at 02:34 PM. Reason: added unimportant San Marcos comment :)

02-01-2007, 02:46 PM	#4
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Re: new 7004r rolls in park I'd disconnect the linkage, place it in park on the tranny, see if it doesn't roll. If it doesn't roll, put the shifter in Park and connect the linkage and see what happens. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

02-01-2007, 11:05 PM	#5
crm318 Alright Alright Alright Join Date: Mar 2004 Location: Midland, Texas Posts: 1,672	Re: new 7004r rolls in park well the original transmision was a th350. when i jam the shifter all the way to park, it goes as far down as it goes and still rolls. i will do it by hand and get back to yall. __________________ 1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies

02-01-2007, 11:25 PM	#6
DirtyLarry Windy Corner of a Dirty Street Join Date: Jun 2003 Location: Pueblo West, Colorado Posts: 2,926	Re: new 7004r rolls in park I have seen brand new transmissions come in from GM hydromatic and Allison with missing park pawl tangs on brand new trucks before. Maybe your trans builder forgot to install the tang. Disconnect the linkage then shift the trans into park by the selector shaft on the actual transmission first though, as others have stated. __________________ Current vehicle collection: 1978 Chevrolet K10, 8.1L, NV4500, NP205 1989 Chevrolet Suburban, 8.1L, NV4500, NP241 1993 Chevrolet C1500 Sportside, TBI 7.4L, 4L60E 2001 Chevrolet K2500HD, Ext Cab, SWB, 8.1L, ZF 6 speed 2014 Chevrolet Impala LTZ 3.6L Vortec 8.1L because life is too short to tolerate underpowered vehicles Instagram

02-02-2007, 12:22 AM	#7
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Re: new 7004r rolls in park I would take the linkage off the transmission and turn the U-shape gear selector on the transmission all the way clockwise. It should have park if everything is right with the transmission. The U-shape piece is different from a truck to a van and they don't swap in one another at all. It will bolt up and work but your wont have park. On the van when its in park the u-shape piece on the trans should be strait up and down like 12 and 6. The one for a truck when its in park is slanted like about 10 and 4 all the way clock wise in park. I don't think the shifter should need adjusted to get park . The only thing I would say it would need adjusted for is to get 1st gear. But that will keep the other gears from being right. The steering column is for a three speed not four so it doesn't let it down in 1st gear. You should be able to get all the other gears fine (Park Neutral Overdrive Drive Manual 2nd). __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI



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