RPM Question

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Jun 25, 2019 | 12:54 PM

SULLY_PA

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Racer

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From: Poconos PA

RPM Question

I just had the 700R4 rebuilt in my 1990 and on the highway at 60\65 I'm at 3000 RPM does that seem right ?

Last edited by SULLY_PA; Jun 25, 2019 at 01:40 PM.

Jun 25, 2019 | 12:57 PM

vader86

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From: Athens AL

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In what gear?

Jun 25, 2019 | 01:02 PM

SULLY_PA

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Racer

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From: Poconos PA

Well i have it in OD ....felt like it went in.

Jun 25, 2019 | 01:05 PM

cdm747

Burning Brakes

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From: Diamondhead Mississippi

St. Jude Donor '17-'18-'19-'20-'21-'22

In my 88 on the interstate i am around 2200 RPM at about 78mph. Something isn't right with yours if your truly in OD.

Jun 25, 2019 | 01:08 PM

Kevova

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From: near the thumb in the mitten

Stock gear it's not.in overdrive it's in 3rd. Make sure shifter cable correctly adjusted. Drive it in D (3rd) see what RPMs are the move shift to OD see if it will shift.

Jun 25, 2019 | 01:27 PM

WVZR-1

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Quote:

Originally Posted by SULLY_PA

I just had the 700R4 rebuilt in my 1990 and on the highway at 60\65 I'm at 3000 RPMS does that seem right ?

You've many things to consider! A '90 is well known for tach error. If you have C68 check with the AC Control. With the KEY- ON but NOT RUNNING > does the tach needle park @ 0? They 'rebuilt' your unit and used your VSS drive/driven etc?

Last edited by WVZR-1; Jun 25, 2019 at 01:29 PM.

Jun 25, 2019 | 01:39 PM

SULLY_PA

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Racer

Joined: Jun 2005

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From: Poconos PA

Well I was just reading about the 90' having tach issues ....So I better check that out first .....After considering that issue ..... I called the shop who did my rebuild and he said the tach was off sometimes by a lot but averaged 1k off with his testing equipment and that he forgot to tell me......this is my 3rd Vette' but my first C4 ....thanks for the input all!

Last edited by SULLY_PA; Jun 25, 2019 at 03:31 PM.

Jun 25, 2019 | 02:55 PM

aklim

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From: Hartford WI

Instead of guessing, perhaps a scanner can tell you this and so much more? Not a code reader, a scanner.

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Jun 25, 2019 | 03:27 PM

SULLY_PA

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Racer

Joined: Jun 2005

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From: Poconos PA

Quote:

Originally Posted by aklim

Instead of guessing, perhaps a scanner can tell you this and so much more? Not a code reader, a scanner.

Who said anything about guessing? I'm going to hook my laptop up and check it out. Thanks ...

Last edited by SULLY_PA; Jun 25, 2019 at 03:30 PM.

Jun 25, 2019 | 04:15 PM

#10

WVZR-1

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Quote:

Originally Posted by aklim

Instead of guessing, perhaps a scanner can tell you this and so much more? Not a code reader, a scanner.

SMART A$$

Quote:

Originally Posted by SULLY_PA

Who said anything about guessing? I'm going to hook my laptop up and check it out. Thanks ...

Well done!!

Checking TCC operation and complete operation I'd think a 'do soon'! KEY ON - NOT RUNNING that parks @ 0 hints reliable. KEY OFF it can park any where!!

Last edited by WVZR-1; Jun 25, 2019 at 04:21 PM.

Jun 25, 2019 | 04:28 PM

#11

aklim

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From: Hartford WI

Quote:

Originally Posted by SULLY_PA

Who said anything about guessing? I'm going to hook my laptop up and check it out. Thanks ...

Assuming you have a way to get data, you are ahead of many

Jun 25, 2019 | 05:01 PM

#12

SULLY_PA

Thread Starter

Racer

Joined: Jun 2005

Posts: 432

Likes: 2

From: Poconos PA

Quote:

Originally Posted by aklim

Assuming you have a way to get data, you are ahead of many

Well I'm going to try with Tunerpro RT but I've heard that may have issues with reading 90' data ...if so I'll download Winaldl and see how that goes

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