Is there something for the 700 R-4 to stop the early downshift at highway speeds?
#1
Supreme Member
Thread Starter
Is there something for the 700 R-4 to stop the early downshift at highway speeds?
I thought I saw somewhere that there was a pice for the valve body that stopped the car from downshifting at the half throttle position. On the highway there seems to be so much gear left in overdrive...but I never get to use it cuase it downshifts at half throttle at around 80 mph
------------------
1987 T/A GTA 5.7L, Bored .020 and ported for .202 valves, edelbrock headers, flowmaster exhaust, JET STAGE II chip, Comp CAM, Adjustable fuel pressure, Airfoil, K&N filter, B&M stage 2 shift kit, and a home depot ram air(Hey it looks good and it works)
------------------
1987 T/A GTA 5.7L, Bored .020 and ported for .202 valves, edelbrock headers, flowmaster exhaust, JET STAGE II chip, Comp CAM, Adjustable fuel pressure, Airfoil, K&N filter, B&M stage 2 shift kit, and a home depot ram air(Hey it looks good and it works)
#2
Supreme Member
Join Date: Jan 2001
Location: Someone owes me 10,000 posts
Posts: 7,164
Likes: 0
Received 1 Like
on
1 Post
Car: 99 Formula
Engine: LS1
Transmission: T56
Axle/Gears: 342
Summitracing.com part #BMM-70237, $34.
------------------
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
3" Hooker CatBack w/Aero Chamber muffler
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
3:73 Posi
Rebuilt 700R4
B&M Megashifter, 5" Autometer Tach w/shift lite
------------------
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
3" Hooker CatBack w/Aero Chamber muffler
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
3:73 Posi
Rebuilt 700R4
B&M Megashifter, 5" Autometer Tach w/shift lite
#3
Senior Member
Join Date: Dec 2000
Location: El Paso Texas
Posts: 640
Received 0 Likes
on
0 Posts
Car: 86 z28
Engine: Hyd. roller 498
Transmission: 700r4
Axle/Gears: 12 bolt 3.90 gears
Don't get the one from summit it really does not prevent the downshift intead I would go with GM part #8673948. Actually I am installin it as soon as it arrives special order from GM dealership.
------------------
383 86 Camaro Z28 ---1/4 mile et>13.65@103mph,,
10.5:1compression Dart Pro 1 Aluminum heads 215cc>2.05/1.60 valves,400 steel crank,cam specs:224/234 at 050 525/525 lift,3500 stall converter,shift kit,4.10 gears,770 Holley Avenger,Victor Jr. Intake,true dual exh,Hooker headers with 40 series Flowmasters,MSD Coil and Module.ALSO SECOND GEN Z28---mods:454 BBC,.546 max lift(doug herbert cam ) 750 Holley vac sec. ,Edelbrock Performer manifold,Holley electric fuel pump,Hooker headers,Flowmaster mufflers,beefed up 700r4 tranny, 3.90 gears, powertrax unit, B&M console shifter.
------------------
383 86 Camaro Z28 ---1/4 mile et>13.65@103mph,,
10.5:1compression Dart Pro 1 Aluminum heads 215cc>2.05/1.60 valves,400 steel crank,cam specs:224/234 at 050 525/525 lift,3500 stall converter,shift kit,4.10 gears,770 Holley Avenger,Victor Jr. Intake,true dual exh,Hooker headers with 40 series Flowmasters,MSD Coil and Module.ALSO SECOND GEN Z28---mods:454 BBC,.546 max lift(doug herbert cam ) 750 Holley vac sec. ,Edelbrock Performer manifold,Holley electric fuel pump,Hooker headers,Flowmaster mufflers,beefed up 700r4 tranny, 3.90 gears, powertrax unit, B&M console shifter.
#4
Supreme Member
Join Date: Jan 2001
Location: Someone owes me 10,000 posts
Posts: 7,164
Likes: 0
Received 1 Like
on
1 Post
Car: 99 Formula
Engine: LS1
Transmission: T56
Axle/Gears: 342
Not to call you a liar, just wondering, if it doesn't really prevent the downshift then how can B&M sell it, isn't that false advertisement. Again not saying what you said isn't true.
------------------
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
3" Hooker CatBack w/Aero Chamber muffler
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
3:73 Posi
Rebuilt 700R4
B&M Megashifter, 5" Autometer Tach w/shift lite
------------------
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
3" Hooker CatBack w/Aero Chamber muffler
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
3:73 Posi
Rebuilt 700R4
B&M Megashifter, 5" Autometer Tach w/shift lite
#5
Supreme Member
Join Date: Feb 2001
Location: Webster, N.Y.
Posts: 1,730
Likes: 0
Received 0 Likes
on
0 Posts
Let me step in here before things get out of hand. B&M and others sell a new throttle valve plunger that will SOMETIMES make a difference. You see there are a lot of different ones that have a port in SLIGHTLY different positions, meant to tailor it to the throttle position the engine will be in under different conditions. The GM valve mentioned is the police valve that truelly allows WOT 3-4 shifts. I hope this helps.
[This message has been edited by transfixleo (edited September 09, 2001).]
[This message has been edited by transfixleo (edited September 09, 2001).]
#6
Senior Member
Join Date: Dec 2000
Location: El Paso Texas
Posts: 640
Received 0 Likes
on
0 Posts
Car: 86 z28
Engine: Hyd. roller 498
Transmission: 700r4
Axle/Gears: 12 bolt 3.90 gears
The reason I know that the B&M kit does not do the job is cuz I have it currently on my tranny and it still downshifts way to early, that is why I am going with the one from GM.
Thread
Thread Starter
Forum
Replies
Last Post
Prodigious
Transmissions and Drivetrain
2
11-07-2020 09:23 AM
someone972
Transmissions and Drivetrain
6
08-30-2015 12:52 AM
1992 Trans Am
Engine/Drivetrain/Suspension Parts for Sale
1
08-08-2015 08:16 PM