Shifting issue from a dig

[Sy-1177]

So my truck has been having an issue ever since i bought it a few months back. When I first got it, it would hit 2nd gear pretty fast from a light and then onto 3rd, like it was shifting too early. Then, if I would try and boost launch it, it would redline the motor and not shift out of first gear. Once it was in second if I got on it from a roll, it would spool right up and hit 3rd with no prob.

I figured the tv cable needed to be adjusted. So after adjusting that, my 1-2-3 shifts are much better where I think they should be, but it still wont shift out of first from a dig. I dont know what the heck is going on with this thing. It shifts firm into 2nd and 3rd which is good, but I just dont know whats keeping it from shifting out of first. Trans fluid is at proper level and is bright red with nothing to worry me there. Anyone have any ideas what may be goin on here or where i could look next?

 

[syclone0517]

Re: Shifting issue from a dig

Just a guess here:could be your 2-4 band clutch slipping under a high load wide open throttle condition. If you have a shop manual you can look at section 7A1-9 diagnosis chart B. Tried to copy paste. But didn't work.:banghead:

 

[syclone0517]

Re: Shifting issue from a dig

recommend you have a look at the governor. Previous owner may have been screwing around with weights/springs in an effort to delay 1-2 shift. Secondly have a look at servo piston. may have a leaking o-ring.:2cents:

 

[SEL777]

Re: Shifting issue from a dig

Are you in OD or D, or shifting as you go?

 

[IGottaSy]

Re: Shifting issue from a dig

It should go into second gear regardless of shifter position (first or second). Something is getting stuck or is worn out.

Things to check.
Is reverse good?
Check govenor gear and make sure it isnt stripped and governor weights make sure they aren't getting stuck.
Check TV cable for proper adjustment at WOT

Check for metal or clutches in pan and check filter.

And when you put fluid back in it make sure the fluid is full engine running hot in park.

1-2 valve could either be getting stuck or has blockage.

 

[Sy-1177]

Re: Shifting issue from a dig

I took it out again last night and i was playing around with the throttle a little seeing where it would shift..... I could get on it pretty good, not WOT, and it would hit 2nd good then, its just WOT that is giving me the issue. I'm not manually shifting it, just letting the trans do its thing. I am thinking a fluid and filter change first just to rule that out and go from there. Im lost when it comes to transmissions and what to look for thats why thins thing has me stumped. Reverse is fine as well, no issues at all under normal driving conditions, just WOT that has the problem.

 

[lil red s-10]

Re: Shifting issue from a dig

i had a clogged cat and it would only build 8psi under wot also wouldnt shift into second unless i let off the gas cleared the cat and it went back to normal at 15 psi

 

[Peter]

Re: Shifting issue from a dig

It's a lot of work, but the TransGo SK700-G Shift Kit cures a lot of problems. I had WOT issues with 2-3 flare (or cut-loose) and generally slow shifting. Now mine's better than new. I didn't know the 700R4 could shift so quick and smooth at the same time, especially at full throttle.
Having said that, the TV cable adjustment is critical. Try going one click either way and see if it helps. Also, don't be afraid to check out the governor. It's not that difficult. If the springs and/or weights are a lot different than OEM, it can really screw up the shifts.

 

[Sy-1177]

Re: Shifting issue from a dig

It's a lot of work, but the TransGo SK700-G Shift Kit cures a lot of problems. I had WOT issues with 2-3 flare (or cut-loose) and generally slow shifting. Now mine's better than new. I didn't know the 700R4 could shift so quick and smooth at the same time, especially at full throttle.
Having said that, the TV cable adjustment is critical. Try going one click either way and see if it helps. Also, don't be afraid to check out the governor. It's not that difficult. If the springs and/or weights are a lot different than OEM, it can really screw up the shifts.

Thanks for the input! Looks like I have some digging to do!

 

[cloneman315]

Re: Shifting issue from a dig

I always manually shift mine

 

[Captain Morgan]

Re: Shifting issue from a dig

I had this exact problem with my "temporary transmission" that I drove out to ChiTown Nats on in 2002.

Since my truck was stolen a few months earlier and my original build trans was ****ed up, it wasn't going to be rebuilt in time for Nats so a friend of the family owned a shop that dealt with Jasper so with no other option in a short amount of time, I figured what the hell. As is turned out, he had a Syclone owner working in his shop at the time, so he spoke to Jasper when ordering the trans in an attempt to make sure it had all the correct parts in it.

We installed the trans and under normal driving conditions or accelerating hard from a roll, it seemed normal. If boost launching, it would NEVER hit 2nd gear without hitting the fuel cutoff first. Brian Hartman drove it at Nats at some point, his thoughts were either a line pressure issue, incorrect governor or I believe something with the valvebody itself.

After Nats, I went back to the shop I bought the trans through, had their tech get on the phone with Jasper, they had us check line pressure in multiple ways, everything was within spec. I believe we looked at the governor but I don't think we had a true SyTy governor to swap in and test so nothing was really conclusive there.

We ended up pulling the Jasper junk back out and sending back under warranty. They sent me a brand new one but by that time my original trans was back together so I just installed that and I've had a brand new "syty spec" Jasper trans sitting on the shelf in its original bag for 14 years now. No idea what I'm ever going to do with it :lol:


Sooooooo long story short, get your hands on a REAL SyTy governor and swap that in, see if the problem goes away. Its probably one of the easiest things you could do to help diagnose the problem.

 

[Sy-1177]

Re: Shifting issue from a dig

I had this exact problem with my "temporary transmission" that I drove out to ChiTown Nats on in 2002.

Since my truck was stolen a few months earlier and my original build trans was ****ed up, it wasn't going to be rebuilt in time for Nats so a friend of the family owned a shop that dealt with Jasper so with no other option in a short amount of time, I figured what the hell. As is turned out, he had a Syclone owner working in his shop at the time, so he spoke to Jasper when ordering the trans in an attempt to make sure it had all the correct parts in it.

We installed the trans and under normal driving conditions or accelerating hard from a roll, it seemed normal. If boost launching, it would NEVER hit 2nd gear without hitting the fuel cutoff first. Brian Hartman drove it at Nats at some point, his thoughts were either a line pressure issue, incorrect governor or I believe something with the valvebody itself.

After Nats, I went back to the shop I bought the trans through, had their tech get on the phone with Jasper, they had us check line pressure in multiple ways, everything was within spec. I believe we looked at the governor but I don't think we had a true SyTy governor to swap in and test so nothing was really conclusive there.

We ended up pulling the Jasper junk back out and sending back under warranty. They sent me a brand new one but by that time my original trans was back together so I just installed that and I've had a brand new "syty spec" Jasper trans sitting on the shelf in its original bag for 14 years now. No idea what I'm ever going to do with it :lol:


Sooooooo long story short, get your hands on a REAL SyTy governor and swap that in, see if the problem goes away. Its probably one of the easiest things you could do to help diagnose the problem.

I have a spare 700r syty trans sitting in the garage, i'll try and rob the governor from it and see if thats it. Thanks for the input! :tup:

 

[ZavzTy547]

Re: Shifting issue from a dig

I have a spare 700r syty trans sitting in the garage, i'll try and rob the governor from it and see if thats it. Thanks for the input! :tup:

The tv cable out of adjustment or kinked could cause what you described. That would be my first step before you get into the tranny. . .

 

[syclone0517]

Re: Shifting issue from a dig

Agreed check cable first.... FYI found old thread regarding gov. weights.....
{Quote:} I found the notes that Brian wrote a few years ago ... Excellent shifts. and the info on what springs and weight to use is very helpful.

" Buy the B&M shift recalibration kit, for a TH350 methinks. Costs like
$30-40 from Jegs/Summit etc, comes with all springs/weights to adjust your
shifts how you like them. I have some data here for different spring combos and their results (tho these results will vary slightly from tranny to
tranny). The KB governor is just a vette governor (TPI years), and I'm
pretty sure you'll pay more thru KB. Also, most have found the 5000rpm
shift accurate, but that they liked a better part throttle shift... so they
ended up buying the shift recalibration kit anyhoo.

For some ballpark figures...
stock shifts - 4100-4300
with ATR/KB mild .430-.450 cam 5000 or so
with .500" + lift 5500-6000

just my estimations, based on torque curves and such.

Brian G
STG"

HERE IS THE ONE EVERYONE IS WAITING FOR
"here's what Jim Fawks and I have compiled.

Jim's runs
my runs
blue and yellow springs
#2 & #3 weights = 4900 rpm wot shifts

blue and yellow springs
#4 & #3 weights = 5500 -5550 rpm wot shifts ********* this gave me
(BG) shifts at
this is in truck now
~5100, good part throttle shifts

blue and yellow springs
********* gives me ~5500 shift
#5 & #3 weights = 5700+ rpm won't shift
eng stops revving and holds rpms around 5650

blue and yellow springs
#2 & #5 weights = 5300 rpm wot shifts

#3&5 blue&green gives 5600-5700 WOT shift
OD shift a bit before 55mph, seems to hang a bit


#4&5, blue&green springs gives me 5600rpm shifts,

with a bit late part throttle shifts

Stiffer springs will give better part throttle shifts, while possibly
lowering the full throttle shifts, so you have to go back and forth.

BTW, anyone who's interested, the B&M shift governor recalibration kit is
B&M part number 20248. It gives full parts and instructions on using the
weights/springs included.

To everyone reading, remember that raising your shift points past 4200-4300
on a truck with stock cam will NOT help performance.

hope that helps
Brian Green
Syclone 160
STG
12.06 @ 113"


hope this help you all
this info was taken from BG all credit to him and well credit to myself for finding it
__________________
Jose
Syclone #1892 All original 2nd owner 41k
Syclone #682 lots of upgrades
92 Typhoon #2351 (SOLD)