Welcome, Guest. Please login or register.
August 21, 2014, 02:17:54 am

Login with username, password and session length
TRADER Feedback System
IS NOW AVAILABLE
* SBFTECH Membership Required *
411905 Posts in 35246 Topics by 8791 Members
Latest Member: unt8mdgt
Search: Advanced search
Advertiser Inquiries
+ SBFTECH.com Experienced Small Block Ford Tech
|-+ General Tech
| |-+ Transmissions/Differentials
| | |-+ Gears/Differential
| | | |-+ Help needed with Gear pattern.
0 Members and 1 Guest are viewing this topic. « previous next »
Pages: [1] Go Down Print
Author Topic: Help needed with Gear pattern.  (Read 2298 times)
Marlin
Small Block
***
Offline Offline

Posts: 155

Location: Silverdale, WA

« on: March 09, 2011, 04:50:57 pm »

I am trying to learn how to do this myself and I need some oversight.

-New FRPP 4.10
-New FRPP 31 spline trak lok
-Old housing from random 97 Mustang GT
-.033 Pinion spacer (Was in rearend)
-.015" backlash (Unable to reuse stock shims)

Not the final pinion bearing. I honed an old bearing for fitting and I need to pre-load the carrier barriers.

I have tried other combo but I get weird results. I tried this with less backlash and it looked strange.

So what do you think of this pattern.












Logged

Marlin

1993 Orange GT
mmb
Guest
« Reply #1 on: March 09, 2011, 04:56:55 pm »

If that was jsut one swipe and not multiple pattern checks you are just fine run it!

A trick to the pinion is to measure the old pinion and shim....   Then measure the new pinion and shim it so it is the same as the old....  That will put it in the same spot. 


Good Job 

Logged
mj88stang
Adv_SBFTechie
Big Block
****
Offline Offline

Posts: 2111


Location: williamsport, pa

« Reply #2 on: March 09, 2011, 05:56:55 pm »

15 thousandths backlash is kinda high, but the pattern doesn't look too bad. but you don't have the bearings you're going to be using in? so i'm sort of lost here as to why you did that.
Logged

1988 hatchback, currently a shell
scienceguy
Big Block
*****
Offline Offline

Posts: 2032


Location: West Virginia

« Reply #3 on: March 09, 2011, 06:22:56 pm »

You said 0.015" backlash...  and you're using new gears?  That's a little excessive for a brand new ring and pinion.  If this were a used R&P that was already worn in, that BL would be more in line.

What did it look like with a tighter setting?

Sometimes gears take a LOT of trial/error...  which would be a bit easier if you were dealing with a 9".  Smiley

Good Luck!
Logged

1966 Mustang, Toploader 4-speed
Pump Gas, Flat Tappet 306
10.134 @ 134.71
mmb
Guest
« Reply #4 on: March 09, 2011, 06:35:35 pm »

Nothing wrong with .015" especially if you are drag racing and putting a lot of rpm through the rear.
Logged
scienceguy
Big Block
*****
Offline Offline

Posts: 2032


Location: West Virginia

« Reply #5 on: March 09, 2011, 07:00:54 pm »

Nothing wrong with .015" especially if you are drag racing and putting a lot of rpm through the rear.

With the t-lok, I was under the -assumption- it was a street car. 
It is a bit on the loose end. 
He can try it and see what happens...

Good Luck!
Logged

1966 Mustang, Toploader 4-speed
Pump Gas, Flat Tappet 306
10.134 @ 134.71
Lightnin McQueen
Small Block
***
Offline Offline

Posts: 188


Location: Shitty,Wyoming

« Reply #6 on: March 09, 2011, 07:50:44 pm »

The pattern looks ok. With .015" backlash the gearset could be noisy. If it were me I would try and get the lash around .008-.010". 
Logged

411ci  Small Block Ford
Cola Crank
Weisco pistons
GRP connecting rods
Kuntz Victor Glidden Heads 7709's w/ Titanium valves
CI roller cam .9xx lift
Ultimate Converter Concepts 7" converter 7500 stall
PAC Springs

Thanks to
Lenny @ Ultimate Converter Concepts
Jake @ Steffs Fabrication
Steve @ Red Line Oil
mj88stang
Adv_SBFTechie
Big Block
****
Offline Offline

Posts: 2111


Location: williamsport, pa

« Reply #7 on: March 09, 2011, 08:22:48 pm »

new gears, new bearings, i want  .008. but  .015 isnt the end of the world. but with new bearings  .015 is going to increase as the bearings get worn in.
Logged

1988 hatchback, currently a shell
Marlin
Small Block
***
Offline Offline

Posts: 155

Location: Silverdale, WA

« Reply #8 on: March 10, 2011, 06:28:32 am »

Gentleman thank you so much for your input. It has been very educational.

This is .010 backlash. This is also with final bearing and final assembly of the Pinion with same .033 shim.
















Logged

Marlin

1993 Orange GT
mmb
Guest
« Reply #9 on: March 10, 2011, 06:58:48 am »

That pattern is staggered and not going to work.   With that pattern the pinion needs to move out of ring gear (thiner shim)

If .015" backlash gave you a pretty pattern.... That is what I would run.   Have you checked runout of ring gear? Is .015" the max?
Logged
Marlin
Small Block
***
Offline Offline

Posts: 155

Location: Silverdale, WA

« Reply #10 on: March 10, 2011, 11:26:51 pm »

This is .015 back lash with the .033 shim. What do you think?

The runout is less than .001 and .015 is the max backlash. I am not trying for .015 it just seems where I end up with the shims.

The difference between this pattern and the top pattern is this is the final bearing and I have established pinion bearing preload with the solid spacer.

Now I think it looks like my Pinion is too far away and I need more spacer. So if I increased the thickness of the pinion shim slightly do you think it is possible to reduce the amount of backlash and get a better pattern? I feel like I am chasing my tail.

This is the original pinion spacer and the same thickness of carrier bearing spacers on the ring gear side as the original one. The carrier is lightly wider then the removed one.















Logged

Marlin

1993 Orange GT
Marlin
Small Block
***
Offline Offline

Posts: 155

Location: Silverdale, WA

« Reply #11 on: March 11, 2011, 08:03:23 am »

Gentlemen I appreciate all the help. I decided to stop bring a pussy and went and tackled this thing. After torquing down the bearing caps I found it made an improvement in the pattern so after preloading the carrier bearings I was able to get a good pattern with .010 backlash. Now on to other projects.

Thanks.
Logged

Marlin

1993 Orange GT
mmb
Guest
« Reply #12 on: March 11, 2011, 08:10:04 am »

Make sure you are checking patterns the way it will run in the car, preloaded on the bearings.

That was my next question, glad you got it figured out!
Logged
Joel5.0
El Hombre
Administrator
Big Block
*****
Offline Offline

Posts: 21409


Location: Puerto Rico
Miracles?.... by appointment only!


« Reply #13 on: March 11, 2011, 08:24:54 am »

Make sure you are checking patterns the way it will run in the car, preloaded on the bearings.

That was my next question, glad you got it figured out!

What He Said.....
Logged

ACRONYMS:
LUK  LMK  JIC  BTSTDTRT  YCYDYP  NFI-YTM  SPOBI, and the classic... DILLIGAS

'86 Mustang GT, X-303 cam, Holley DP 700, RG Tran., 289 Heads   Ford Smilie 2


Quote from: Joel5.0
The right to be stupid is inalienable for sure however, there is no such thing as a right to impose stupidity onto others
Great Thoughts will Overwhelm a Feeble Mind
There is never money to do it right, but there's always money to do it over.
Knowledge based on external evidence is unreliable.
He, who doesn't ask, does not deserve an answer.
A mind is like a parachute it only works when it is open.  (oldmanjoe)
If you can't explain it simply, you don't understand it well enough. (Albert Einstein)
Tuning on a Dyno for the track, is like swim practice in a bathtub.
I can explain it for you, but I can't understand it for you. (90lxcoupe)
The proof of understanding is the ability to explain it. (H. Torruella)
Ignorance is bliss, but stupidity is orgasmic.
Fraud and falsehood only dread examination. Truth invites it. (Samuel Johnson)
The chaotic resistance of the opponents leads to the conclusion that they are not prepared to meet the challenge. The problem is already much more psychological then technological. [Bojidar Djordjev]
Individuals are rational and humane... Crowds are reactionary and barbaric. (Jason)
The person who says it cannot be done should not interrupt the person doing it. –Chinese Proverb
Nothing sways the stupid more than arguments they can't understand - Cardinal de Retz
Pages: [1] Go Up Print 
« previous next »
Jump to:  



Powered by MySQL Powered by PHP Valid XHTML 1.0! Valid CSS!
Powered by SMF 1.1.18 | SMF © 2013, Simple Machines



408 Stroker