differential FORD CAPRI 1974 Workshop Manual

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r'9' 8.11 Differential ClOsing and bCiHillU C<lP identificatio n '''nrks (Sec 8)
Fig. 8 .1 3 Removing tholockinu pin IrOtlllh c pinion goar shaft (Sec 8)
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~i9. 8.1 5 Checking tho d iff erential sid e gear ontilioal (Sec 8)
Fig. 8.12 RClll ovin!J the differential assemhlv (Sec 8)
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fig . 8 .1 4 Oiffercntiill cOIllI)oncnlS (Sec 8)
Fig. 8.1 6 Chocking the crownwheel and pinion backlash (Sec 8)
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Chapter 8 Rear axle 139
ci,cumS«"Ulces mny only one pmt of the two be renewed. fnspect the dllfe,enti,ll pinions nnd side gems for signs of pitting. score mMks. Chipping nnd general wem. Obtain new gears as necessa,y . Inspect the th,ust washers lor signs of weM or deep sco,ing. Obwin new thrust wnshe,s as necessary. Once the pinion o il senl has been disturbed it must be discMded and a new one obtained. 20 When new pnrts have been obwined ns required. reassembly cnn begin. First lit the thrust washers to the side gems and place them in position in the differential housing. The ground side of the thrust washers IllUSt lace the side gC.Jrs. 21 Place tile thrust wilshers behind the dillelentini pinion genrs i1nd mesh these twO Oems with the Side gears through the tWI) ilpertores in the lilllerentlill housing. Milke sure they ilre diametlicilily opposite 10 each other. RO«l!e the clillerent'i11 pinion gears through 90' so brinUlI1\j them into line with the pinion genr shnlt bore 111 the housinlt 22 Insert the pinion genr shnft with the lock In!) p'n hole III line with the pill hole. 23 Usinu leeler 1),IU!Jcs. measure the en{lll(",t 01 ench s,de Be,,,. II the speclficd h\Jure IS excecrt"d. IU!W tl&#34;u~t washlllS mu"t he olJt,uned
-omnlllie the a~~el)lhly ,lg,llll ,trld ht new thll,st wa:,lu'<IS . Lock the P""O" near shalt U~I&#34;\I the pill whn:h should hc wpped hilly h01)1I, UStrlO n SlIlIah l" d,a",,:ter parallel pill pUIH.:h. Peen ()V,,' thc ()I the p", hole to stop the pill WOlklll!J liS wily out t." The tlowllwhcui m;,y next I,,, Idllted F,,~t heat 11 101 nppro~I&#39; ","lllly 10 nHIHltc~ III 1I0111IIIJ W,lter Wipe the ,,,nl"IIJ l aces 01 the c,ownwhuui ,Ind dllferuntlal houslI'U ;,nd. II OliOlnal p,lItS ,lie l,utnU used. plate the Clownwlll!cl tnto p(l~ltton With the prev,oll~ly m,llie marks nhOllud Relit the elO1ot IHlllS th;11 sucule the ,;r()wllwlwel ,trld tighten Ihese III a I"og'esslve and dla\lunill rlt"nner to the spe.:,fled torquc. 26 PI<lce the Shlill packs b<ltk III thell Oll!)lnal foiled pOSition on the differential housing be<lrlllU IOC<lllon USllllJ .1 p,cce of sUlla!Jle diameter tube ve,y c,1refully ftt tim d ifferential housln!J bearlllgs with the smaller dlnmeter 01 the taper outw,Hds The hearing t,lge must nut in nny wny be dilrllnged. 27 PI,1ce the shims hehllld the hcnd of the pinion geM nn[1. using ,I
suilahle dinmetci tul!c . cmclully lit the larg"r ti!per rollI)' benllll\) onto Ihe pillion shafl. The lar\ler dlilllleter 01 the be,lllllU !\lust be nex110 the pInion head
28 Using soitable diameter tubes. fit the two Wper roller bearing cones into the finnl dlive housing. making sure that they ale litted the correct way round. 29 Slide the shim and spncer onlO the pinion shalt and insert inlo t he final drive housing. 30 Relit the second and smaller diameter wper loller bea,ino onto the end of the pinion shaft lind 101i0w Ihis Wilh a new oil seal. Sefore Ihe senl is nctually fitted. apply some grense to the inner Ince between the two lips of the seal. 31 Apply n little jOinting compoond to the outer Ince of the seD I. 32 Using n tuhulilr dllft 01 suitable dinmeter, carefully drive the oil seal into the fillal (hive housinlJ. Make quite sore thnt it is lilted squarely and flush with the housinU. 33 Refn the drive pinion IInnge nnd hold securely in n bench vice. It II fixed lenIJth spncCl is Itlted. fit ilnd tighten the pinion nut 10 the spec ,lied lorque. If a collapsihle spnce r is f,tte d. follow the prOCedlHe
g iven in Section 7 paragraph 14. setting the pinion turning to'que to hetween 25 nnd 2.7 Nnt (1.810 2 0 Ihf It) which includes 0.2 to 0.<1 Nm (0.15 10 0.30 Ibl It) lor the ndriitional friction of the new oil senl II new hea,inns h~ve heen filted. logether With n li~e(l len(Jth SP,lCer. check thm the tOrlllllg torque is bel ween the limits just stmed. If not. a longer or shorter spilcer must he I,tted until the setting IS correct 34 Fit the healing cones to the cf,fierenllal houslIlg heallll(Js and carefully ease the housing Into posilion in the finill drive housmg 35 Relit the be,IIII'!J CilpS in thell originnl pOSitions. Srnc,ll n httle JOlntmg compound on the threilcfs 01 each cnp secuIII'O bolt nnd fit 11110 position. When ,111 low halts have bcen rein ted tiUhten these up in a (h"IJonal and progresSive milnne, to the speCi fied torque. 36 I I pOSSIble. 1Il00nt n dlnl in(licntor onu(Je so thnt the probe IS resting on one of the teeth of the crownwheel and determine the backlash hetween the clownwheel and pillion. The bileklash may be vMicd by elecreasll'\) the thickness of the shims bellind one beilling nnd incrensing the thickness of shirns behind the othcr. thus moving the crownwheel ;nlO or out ofmcsh as requi,ed. The tOt.llthlckness 01 the shims must not be chnn\)ed. 37 The hesl check the do·it·yourself owner cnn make to aSCerta", the correct meshinu of the crownwheel ilnd pinion is to smear ,I htt le engineer's blue onto the crownwheel and pinion iJnd then lot"te the pinion. The con1<lct lIlil,k should nppenr rl\fht ill the Iluddle oJ th..,
COlleCI 100110 CO"t.1ct
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t Heavy conWCl 0" huel. at 100lh !,leu Move p'",on lowa,ds crownwhcd u:.!:.crt:1 3nd c,ownwhuel towards p,n,on
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l ' Fig. 8.17 CrownwheeJ and pinion setting chart (Sec 8)
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·0 ) Chapter 8 Rear axle
crowllwh(lcl teeth. Refer to Fig 8.' 7 where the corrcCl100l h paltcrn is shown, Also shown arc incorrec t loorh patterns ilnd the method of oi11<lining the conect pattern, Obviously th,s will ll1ke time and further dismilntllllQ but will be worth ,I. 38 Refit the brilke b<lckplilles followed by the rCM cover (Section 6) ,1rld ilxleshMts (Section 4). 39 ReI,t the (C,lr ilxlc (Section 3),
9 Wheel stud -renewal
Chock the IrOllt wheels then lilck up the ,eaf of the Cill ilnd sUPPor! will> ilxlc S1<Jnds. Remove the reM wheel. 2 RcicilSC the h;mdhr,1kc ilnd remove the brake drum. 3 Apply p(Hl Clrminu 00110 the slud to be removed ilml allow it to sO<lk lor $cvC"illm,nutes.
,I PU.lSS Or dllvc the wheel SlUt! through t he axlestwft /I;)n9c. 5 Clc<lll the hole III the flan!)!} then ,nsert the new stud f'0111 iJehind and nloHIl Ihe splines W'lh those milde hy the o"oonal stud,
" 1',,11 tho slUd lully "'to Ihe lIan!)c "s"'\.1 ~ wheel nut ~nd wilsho,s as ,own III Fill . 818 ., neht the IHilke (hum ,11ld ,e~, wheel then lowel the eM 10 the
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10 lillli ted-slip diffc ronli"l-\.Ien er,,1
The IIllllwd·shp (I,fle,ent,,,1 's f,tled to 2 8 Spec,,,1 modl:ls ""d Its "';1111 purpose is to il,event wheef SPIll 01 the IIlsule ,ea, wheel when dnvin(l round bends or oul of l>emls w ith lull enOl/Ie powe, applied.
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ll. 8.19 Cutaway view o f the limited·slip differential (Sec 10 )
A Crowf!whecl /J fJ'{""I!/IIi,,/ carrier r: PIllIOII ue .. " /J $h .. ,{1 r fhlll.I'IIIII!llill",,,,II/,1C<.'S r Uukr IJ{;,I<.-((III """Ht'nll,,1 ,;,/1 IIf,'1 ) (; 1"111:1 I"a/(: ((III axle .<ll/mt'S) If Elld (."ov,:, .J /lIII}S/ ",:,slwi
K Suit.' !I''""'' I. /lIIIHI IIII!/-I" 1M S,IIIIIII woIsl".:,s
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F ig . 8.18 U sinll 11 wheel nut 10 pull il slud in to lhe ilJ(le
flonge (Sec 8)
Under these cond,tlons thNe I S il weiohttriln~IN 1 0 lilo oulslde wheel. ,111d lho deS'Bn of the standJIl1 (hlf(:relll,al is such Ihal all ,1dvmse I(uque con 110 ajlpl".:d 10 l11e Ills, de wheel ca"slIlII wheel ~pln, The l,lll ,W<I·slop <IoIf'''''''!I,,1 lIS(:~ lllUI1I·plol1C r.IUlches In r.oumerar.1 wheel Spill and Ihe ",UI &#34;I~n h"s" hllllll:l IWllel,t in lh.1llhc r.ar r.all pull ilway I)lOr(, jJIlSII,vo.:iy "" ~I,pp(:ty ~&#34;,Iac(,s. The 1ll"lt, 1,lall' (.I " tl'hos ,lre 1'0,Uleclctl hVlwevn Ihe ,1xle~haI15 anti two Ih""1 &#34;&#34;~IS wh,ch suppOltlhe pinion (Ieil' sholis til speCial sqllare CU1'Ollts (F'(I B 1!) Wh .. ;n power ,s ,1pphed. !he Shilfts force the th'lIst
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Chapter 8 Rear axle 141
lings apm! and compress the clutch plntes. The nction is varinble. depending on the power npplied. so tlMt under full power the dIfferential will lock completely nlld full torque will be appl;ed to both
11 Fa ult diagnosis -rear axlo
Symptom
NOIse
"Clonk· Oil nccelera tlon nnd deceh:ontlun
,... Ilenka\Je
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renr wheels . Under coasting or overrun conditions the differential will operate as a normal stnndard unit. The unit incorpora tes four different;nl pinions <IS <lgninst the two pinions lilled to standard units.
Roason(s)
Worn axleshaft bearing Insufficient luhricant
Worn dlfferentinl houSIng bearings Worn crown wheel and pinion Incorrect crown wheel nnd pinion mush
Worn 1I. leshalt splrnes Excessive crownwheel nluJ pinIon bncklnsh
Pm ion oil senl Icnkrng ReM cove r gasket leaklllg 011 seal on <lxlesh<lfl bearing leakIng
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